Article of faith in gospel (5)

I believe the answer is:

thing

'article' is the definition.
(thesaurus)

'of faith in gospel' is the wordplay.
'of' indicates a hidden word.
'THING' is hidden within 'faith in gospel'.

(Other definitions for thing that I've seen before include "Individual unit" , "Individual object" , "A creature" , "Obsession" , "Object; gadget" .)

I've seen this clue in The Telegraph.

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