Couple without love kiss and curse (4)

I believe the answer is:

jinx

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'curse' is the definition.
(I know that curse can be written as jinx)

I can't explain the remainder of the clue.

(Other definitions for jinx that I've seen before include "Bringer of bad luck" , "Person or thing thought to bring bad luck" , "Evil spell" , "Thing or person that brings bad luck" , "Hoodoo" .)

I've seen this clue in The Times.

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