Form of service arranged for the guilty around mid-afternoon (7)

I believe the answer is:

liturgy

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'form' is the definition.
(I have seen 'Form of worship ' mean 'liturgy' so perhaps 'form' could also mean 'liturgy')

I don't understand the remainder of the clue.

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(Other definitions for liturgy that I've seen before include "Standard form of church service" , "Prescribed forms for church services" , "Form of religious service" , "Form of worship" , "Religious rite" .)

I've seen this clue in the Evening Standard.

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