Genius Crossword N0 256

[Matakari]

Good morning, help with the following would be appreciated, thanks!

11a Spirit dispenser about to exist made of thin flexible glass (5-5) : ??L???????

14a Posh architect to stop coming over (3-2-3) : A???????

24a Most anxious hush after White City in turmoil (10) : ???T?H????

3d Lecture faculty for discerning noted works– roll up! (6) : ?A???L

(PREAMBLE: Each clue’s wordplay indicates an extra letter: these spell out an instruction. Following this will take the solver on a journey. However, the journey will quickly be thwarted in a couple of places. To resume it, the solver must change one letter each time. The journey will resume at pace until close to the end, when one final letter change will complete a release from 50 years ago this month. The original letters give a Homeric summary of its conclusion. Final entries are all real words or names.)
 

[quinol]

well 14a is lah di dah  hadid architect and hal(t) back

twitchiest?

[JJ109]

I have just started this Matakari!

I think 11a is Fibre Optic, but cannot parse the fibre bit!

[quinol]

fire (spirit) about be with no e perhaps jj

[JJ109]

Thanks quinol!

[quinol]

3d earful?

[Neveracrossword]

Quinol, yes to Twitchiest, an anagram (in turmoil) of the 'white city' and a usual 'hush'... with a letter dropped.

[Matakari]

Many thanks, quinol and jj109, I did get "earful" and am stuck now on these, thanks!
 

21a  International British gymnast's trapped fingers (8)  : ???D????
28a  Uncle initially avoided working with crime ring (8)   : ??????L?
20d  Religious community members see noses put out of joint (7) : ???E???

[Neveracrossword]

22 Just an anagram, drop the O from 'see noses'.

21 Twiddles

28 Encircle

[Matakari]

Thanks, NACW, 

Thanks, NACW, the last three to end this one!

7d    Figurine Tim Allen keeps inside coat (6) : ?N?I?A  ( INTIMA )
17d  Honey, I'm twelve essentially (3) : M?L  ( MEL )
26d  Overwhelming favourite in classic race advanced from capital ( 4 ) : H?R?  ( HARE )

[newmodarmy]

7d and 17d look  okay if there's a superfluous letter in each clue- and if Mel is a word for type of honey