Mortal sin (7)

I believe the answer is:

avarice

'mortal sin' is the definition.
(avarice is a kind of mortal sin)

This is all the clue.

(Other definitions for avarice that I've seen before include "Insatiable desire for wealth" , "A deadly sin" , "Cupidity" , "Greed, covetousness" , "Insatiable lust" .)

I've seen this clue in The Sun.

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