Stops waffling (4)

I think it could be either:

Which length description are you looking for?:

7 4*

'stops waffling' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for opts that I've seen before include "Makes a choice from a range" , "Picks needed" , "Elects" , "Settles" , "Selects as an alternative" .)

I've seen this clue in The New York Times and the USA Today.

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