Part of choral society too? (4)
I believe the answer is:
also
'too?' is the definition.
(I know that too can be written as also)
'part of choral society' is the wordplay.
'part of' indicates the answer is hidden within the clue.
'ALSO' is hidden within 'choral society'.
(Other definitions for also that I've seen before include "revolutionary a part for Yugoslavia" , "Furthermore" , "in accompaniment" , "Additionally" , "admitted to Royal Society > too" .)