Hollow stamens inside a flower or flowers (7)
I believe the answer is:
blossom
'flowers' is the definition.
(I've seen this before)
'hollow stamens inside a flower' is the wordplay.
'hollow' means to remove the middle letters (the word is hollowed out).
'inside' indicates putting letters inside.
'a flower' becomes 'bloom' (synonyms).
'stamens' with its centre removed is 'ss'.
'ss' placed into 'bloom' is 'BLOSSOM'.
'or' acts as a link.
(Other definitions for blossom that I've seen before include "Flourish and prosper" , "Fruit tree flowers" , "Mass of flowers - mature" , "Yield flowers" , "May, possibly" .)