She's a blossom (3)
I believe the answer is:
may
I believe this is a double definition.
'she's' is the first definition.
'a blossom' is the second definition.
(I've seen this before)
(Other definitions for may that I've seen before include "The permissive month" , "Might" , "Has permission" , "The Darling Buds of - (H. E. Bates)" , "Could" .)