Belief in some sacred order (5)

I believe the answer is:

credo

'belief' is the definition.
(credo is a kind of belief)

'in some sacred order' is the wordplay.
'in' indicates a hidden word.
'CREDO' can be found hidden inside 'some sacred order'.

(Other definitions for credo that I've seen before include "Set of beliefs about leftist circle" , "Faith - I believe" , "Doctrine or belief" , "Part of the Latin Mass" , "set of ideas" .)

I've seen this clue in The Times.

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