Iq 1818

[hankir]

9 Thematic clues have longer answers than numbers in brackets show.
Some other clues have an extra letter in wordplay.

6. Shelter Aussie man leading band (6)
18. Wrong mark since recessive in mutant mice by union of
disparate germ cells (8)
16. Poet entertaining partners with black horse (4)
25. Previously sprinkled juice over split (6)
29. Arrange pieces in abridged report (6)

Thanks.

[Neveracrossword]

6 Covering, Cove+Ring, not all to be entered.

16 Skewbald - Skald, poet, EW, partners, (bridge, card games) and B, black... not all entered.

[ProfessorMaisie]

18 EXOGAMIC

[ProfessorMaisie]

25 STAND

[ProfessorMaisie]

29 DO ('arrange') MEN (inside) CUT = DOCUMENT [thematic entry].

[ProfessorMaisie]

...sorry, hankir (I gave you 25a) 25d - S[a]P+RENT ['a' extra].

[hankir]

Thanks NAC and ProfessorM.
Now I have 7 thematic entries. Not entered yet.

[ProfessorMaisie]

British entertainment again for the theme (with a long history on BBC radio 4). There rules of the game disallow 3 things, there are 3 types of each (all different).

[ProfessorMaisie]

...'the rules...'

[Keepatit]

ProfessorM, I’m a little puzzled by the third group, I’m assuming 10d, 36a, 39a. How do they qualify as such? I can see how two letters recur (backwards) in the first two, but there must be more to it than that?

[hankir]

Chances are I have never heard of the 60s game show on BBC.
What are the word lengths of message from extra letters.

[ProfessorMaisie]

That's right, Keepatit - it's as simple as that (but don't think of them going forwards or back - they're simply discarded when they crop up again, one by one)

[Keepatit]

Thank you so much, ProfessorM. That’s been puzzling me for 24 hours! I was overthinking it

[ProfessorMaisie]

8 (the name of the creator) 5+4 (the type of show it is).
The title is 4 1 6 (and I know we've had the same theme and similar treatment before, but if you need a further hint just say, hankir).

[hankir]

Thanks ProfessorM.
Got distracted by EV. Almost done with grid but will start a new thread.
What is 13a? I have T??O?.
And 21a?
For creator's name starts with and ends in R?

[ProfessorMaisie]

13a Def a hybrid ('cross') US 'sleeper' on a railtrack = TI[e] 'e' extra + 'almost' GON(e).
21a Is reversed in the first 2 words of the clue [after you remove the extra 'a'].
Creator's name starts with 'm' (the extra letter in 11a) and ends 'r' (from 35a).

[ProfessorMaisie]

...sorry, hankir - no extra letter in 21a (it's a straight clue).

[hankir]

Thanks ProfessorM.
One of my letters was wrong but found Ian.
The game was unknown to me.
I read up on it and found the letters to be dropped from 9 answers.
Will try to finish EV soon.

[Cillagoose]

Missing one thematic. Third of group that has 1d and 16d. Assuming there are three of each type?

[ProfessorMaisie]

34d

[Cillagoose]

Thanks, see that now.
2d seems to me to yield an extra D..which doesn't fit in the hint?