Yearning (4)
'yearning' is the definition.
(I know that yearning can be written as longing)
This is all the clue.
(Other definitions for longing that I've seen before include "Deeply felt desire" , "Yearning desire" , "Hunger" , "thirsty" , "Earnest, heartfelt desire" .)
(Other definitions for itch that I've seen before include "Tingle" , "Slight irritation" , "Hunger, longing" , "A strong restless desire" , "Yen" .)
'yearning' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for lust that I've seen before include "Lecherousness" , "Passionate desire" , "Libido" , "Carnal desire" , "Deadly sin of extreme passion" .)