Secret belief (10)

I believe the answer is:

confidence

I believe this is a double definition.

'secret' is the first definition.
(I know that Confidence is a type of secret)

'belief' is the second definition.
(thesaurus)

(Other definitions for confidence that I've seen before include "Private" , "courage" , "belief in one's own abilities" , "Shared secret - belief" , "in which one's relations will not be mentioned" .)

I've seen this clue in The Globe and Mail.

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