Modest party with coke, perhaps, but ecstasy discarded (7)
I believe the answer is:
bashful
'modest' is the definition.
(thesaurus)
'party with coke perhaps but ecstasy discarded' is the wordplay.
I cannot quite understand how this works, but
'party' could be 'bash' (term for a party or celebration) and 'bash' is found in the answer.
The remaining letters 'ful' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for bashful that I've seen before include "reserved" , "Snow White's self-consciously timid assistant" , "Coy" , "Doc's shy pal" , "Dwarf" .)