Plant life (5)
I believe the answer is:
flora
'plant life' is the definition.
(I know that plant life can be written as flora)
This is all the clue.
(Other definitions for flora that I've seen before include "__ MacDonald, heroine of the 1745 Jacobite rising" , "The plants of an area (5)" , "For example, Miss Macdonald" , "local plants" , "vegetation" .)