Caviare can constitute a sin (7)

I believe the answer is:

avarice

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

'caviare can constitute' is the wordplay.
'caviare' anagrams to 'AVARICE'.
However, I am unsure how this is indicated.

Can you help me to learn more?

(Other definitions for avarice that I've seen before include "Parsimony" , "Insatiable lust" , "Extreme greed for wealth" , "Eager desire" , "Stinginess" .)

I've seen this clue in The Sun.

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