One of the deadly sins (4)
I believe the answer is:
lust
'one of the deadly sins' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for lust that I've seen before include "Depraved desire" , "Intense sexual desire, a deadly sin" , "Lecherousness" , "Passionate desire" , "Deadly sin of extreme passion" .)