They may wilt and droop in the centres (8)
I believe the answer is:
corsages
'they may wilt' is the definition.
The definition suggests an adverb but the answer is not.
'droop in the centres' is the wordplay.
'droop' becomes 'sag' (synonyms).
'in' means one lot of letters goes inside another.
'the centres' becomes 'cores' (core is a kind of centre).
'sag' put into 'cores' is 'CORSAGES'.
'and' acts as a link.
Can you help me to learn more?
(Other definitions for corsages that I've seen before include "sprays of flowers!" , "Posies, nosegays" , "Go caress with small bouquets for woman" .)