Flower visitor (3)
I believe the answer is:
bee
'flower visitor' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for bee that I've seen before include "Hairy-bodied insect" , "Insect, may be in bonnet" , "Winged insect" , "Flying insect (often busy)" , "Busy person" .)