Waiting perhaps to provide thematic setting (7)

I believe the answer is:

service

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'waiting' is the definition.
(I've seen this before)

I can't explain the rest of the clue.

(Other definitions for service that I've seen before include "Employment" , "Form of religious rite; car overhaul" , "Set of matching crockery" , "start of action in court" , "Religious ceremony" .)

I've seen this clue in The Irish Times.

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