Don't leave chaps without your top pollen producer (6)
I believe the answer is:
stamen
'pollen producer' is the definition.
(I've seen this before)
'don't leave chaps without your top' is the wordplay.
I cannot quite understand how this works, but
'chaps' could be 'men' (chap means a man) and 'men' is present in the answer.
The remaining letters 'sta' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for stamen that I've seen before include "Flower pollen carrier" , "Flower's pollen carrier" , "Part of flower producing pollen" , "Male ditto" , "Pollen producer" .)