Pagans, ones about to procrastinate? (9)

I believe the answer is:

idolaters

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'pagans' is the definition.
(idolater is a kind of pagan)

I can't explain the rest of the clue.

(Other definitions for idolaters that I've seen before include "Those worshipping pop stars" , "people with the wrong beliefs" , "devotees" , "Pagans" , "worshippers" .)

I've seen this clue in The Guardian.

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