On telephone, stop money order (6)

I believe the answer is:

cheque

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'money order' is the definition.
(thesaurus)

I don't understand the rest of the clue.

(Other definitions for cheque that I've seen before include "Method of payment" , "Signed money order" , "Paper payment" , "Written document authorising payment to recipient" , "Means of payment" .)

I've seen this clue in The Times.

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