Enticement to hide source of considerable wealth (5)
I believe the answer is:
lucre
'wealth' is the definition.
(I've seen this before)
'enticement to hide source of considerable' is the wordplay.
'enticement' becomes 'lure' (lure is a kind of enticement).
'to hide' means one lot of letters goes inside another.
'source of' says to take the initial letters.
The initial letter of 'considerable' is 'c'.
'lure' enclosing 'c' is 'LUCRE'.
(Other definitions for lucre that I've seen before include "Sordid gain; riches" , "financial gain" , "There's money" , "Bread, dough, lolly" , "Wealth - cruel (anag)" .)