Nectar collector briefly on blossom, perhaps (5)
I believe the answer is:
maybe
'perhaps' is the definition.
(synonyms)
'nectar collector briefly on blossom' is the wordplay.
'nectar collector' becomes 'bee' (I've seen this in another clue).
'briefly' means to remove the last letter.
'on' is a charade indicator (letters next to each other).
'blossom' becomes 'may' (I've seen this before).
'bee' with its final letter removed is 'be'.
'be' after 'may' is 'MAYBE'.
(Other definitions for maybe that I've seen before include "Perhaps, might happen" , "Perhaps, possibly" .)