Accomplice must finish early, pinching antique Scottish pot (8)

I believe the answer is:

cauldron

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'pot' is the definition.
(I know that cauldron is a type of pot)

I can't explain the rest of the clue.

(Other definitions for cauldron that I've seen before include "Witch's brewing pot" , "Place that's seething" , "Large kettle" , "Witches' pot" , "Very large metal pot for boiling" .)

I've seen this clue in The Telegraph.

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