Theatricality fitting in good religious gathering (4-7)

I believe the answer is:

camp-meeting

'religious gathering' is the definition.
(type of religious service)

'theatricality fitting in good' is the wordplay.
'theatricality' becomes 'camp' (as in a camp actor).
'fitting' becomes 'meet' (meet can mean appropriate or apt).
'good' becomes 'g' (abbreviation).
'camp'+'meet'+'in'+'g'='CAMP-MEETING'

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