Herald Cryptic

[creamegg]

10a pretend to be retired, indeed 3,2
not ??

12a undefined 7,2
w?n???? ?f

14a place to take off any cap in delphi
h?l????

18a brief costumes, society audibly objects 3-4
t?? ????

19d undefined 3,4
??e ???l

15d cleaner 'does' once, bagging roughly 150
????c???h

Don't understand why two of the clues have the same clue, but I'm sure you clever lot will.

[logjammer28]

Mixing the letter "a" (the cap of any) with the letters in "delphi" should give you a place where certain aircraft take off.

[Mamyalynne]

18 Tut Tuts

[dannyk13]

You would have to mix delphi with (c)ap to get the answer

[Captain2]

15 D-ust-CL-oth

[Captain2]

Only one 'P' in the answer Danny

[Mamyalynne]

No Danny - Delphi +a

[dannyk13]

Doh, must go to Specsavers.Sorry.

[Captain2]

RE; these 'undefined' clues - is there a theme given in a preamble anywhere, or is there a theme coming through in the other answers that might point us somewhere?

[creamegg]

Thanks, any ideas on 10a, 12a and 19d?

4d mirror changing hands and couch
g?a??

13a card players request , reduce number on top
t?i?t

23d yobbo and gangster about to be charged
l???n

25d played by tennis no 1, breaking serve, final round
a???d

[creamegg]

no there isn't any theme given, so I'm so confused.

[logjammer28]

4d A mirror is a glass. If you change hands (i.e. change (l)eft for (r)ight), you'll get an unwanted type of lawn!

[Toorak]

13 twist
23 laden
25 acted

[Captain2]

13 Tw(o) 1st

[jollyroger66]

13a Tw(o)1st

[Toorak]

Tw(o) ist (on top)
La (al - Capone - reversed) & den (Ned reversed)

Ac t(Ennis) e (roun)d

[Toorak]

10 not up

Put on (pretend) reversed

[logjammer28]

13a If you reduce the number "two" to "tw" then add "ist" (1st = on top), you'll get a request made by a pontoon player.

[logjammer28]

4d Apologies. My answer is even more devious than the clue! I should have said that what you get is a growth, of which couch (pronounced ***) is an unwanted variety.