Long wood (4)
I believe the answer is:
pine
I believe this is a double definition.
'long' is the first definition.
(to pine for someone is to long for them)
'wood' is the second definition.
(pine is a type of wood)
(Other definitions for pine that I've seen before include "Tree, waste away" , "Fir tree; languish" , "Long for the conifer?" , "Coniferous tree" , "Evergreen conifer" .)