She's evergreen (6)
I believe the answer is:
myrtle
I believe this clue is a double definition.
'she's' is the first definition.
'evergreen' is the second definition.
(I've seen this before)
(Other definitions for myrtle that I've seen before include "Shrub with white flowers and aromatic berries" , "Termly (anag.)" , "Shrub with purple-black oval berries" , "Bush" , "Shrub; female name" .)