Long leg and point (4)
I believe the answer is:
pine
'long' is the definition.
(to pine for someone is to long for them)
'leg and point' is the wordplay.
'leg' becomes 'pin' (pin is a kind of leg).
'and' means one lot of letters go next to another.
'point' becomes 'e' (compass point).
'pin'+'e'='PINE'
(Other definitions for pine that I've seen before include "Conifer grown for wood" , "Yen - tree" , "type of wood" , "Mope; tree" , "Kind of needle" .)