Evergreen trees (5)
I believe the answer is:
pines
'evergreen trees' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for pines that I've seen before include "Longs for or languishes" , "Longs for evergreen trees" , "Yearns for the conifers" , "Coniferous trees" , "Yearns for evergreen trees?" .)