Pine away (8)
I believe the answer is:
languish
'pine away' is the definition.
(I know that pine away can be written as languish)
This is the entire clue.
(Other definitions for languish that I've seen before include "Haul sign away - lack vitality" , "Become discouraged" , "Lose or lack vitality" , "Pine, waste away" , "Grow weak or feeble" .)