Temptation to snatch Charlie’s sordid gains (5)
I believe the answer is:
lucre
'sordid gains' is the definition.
(term for money when regarded as something sordid)
'temptation to snatch charlie's' is the wordplay.
'temptation' becomes 'lure' (lure is a kind of temptation).
'to snatch' means one lot of letters goes inside another (inserted letters are snatched or taken).
'charlie' becomes 'c' (phonetic alphabet: alpha, bravo, charlie etc.).
'lure' going around 'c' is 'LUCRE'.
(Other definitions for lucre that I've seen before include "Ulcer (anag)" , "(Dishonourably gained) money (poetic, literary)" , "Possession of the rich" , "Criminal gains maybe" , "tin" .)