Yen, hankering (4)
I believe the answer is:
itch
This clue is a double definition.
'yen' is the first definition.
(I've seen this before)
'hankering' is the second definition.
(I know that hankering can be written as itch)
(Other definitions for itch that I've seen before include "It needs scratching" , "Feel tingling sensation in skin" , "Uncomfortable feeling" , "Tickle; urge" , "Skin irritation" .)