Go head-to-head (3)

I think it could be either:

Which length description are you looking for?:

vie

'go head-to-head' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for vie that I've seen before include "Rival" , "I've got to compete" , "Contend, compete" , "Jockey" , "I've got to contend" .)

I've seen this clue in the LA Times and the Newsday.

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