Form couples (4,2)

I think it could be either:

Which length description are you looking for?:

4,2

4,3

pair off

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

This is the entire clue.

(Other definitions for pair off that I've seen before include "Form a couple" , "Form couples" , "match" .)

I've seen this clue in the King Feature Syndicate, the LA Times, The New York Times, The Telegraph and The Times.

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