Religion is a virtue (5)

I believe the answer is:

faith

I believe this is a double definition.

'religion' is the first definition.
(synonyms)

'virtue' is the second definition.

'is a' acts as a link.

(Other definitions for faith that I've seen before include "Unshakeable belief" , "Confidence" , "religion" , "Strong belief in a supernatural power" , "Total trust" .)

I've seen this clue in the Evening Standard.

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