Stretch team, passing across field (4)

I believe the answer is:

span

I believe this is a double definition.

'stretch' is the first definition.
(thesaurus)

'team passing across field' is the second definition.
(a pair of horses or other farm animals)

(Other definitions for span that I've seen before include "Extent, space for odd pans" , "Bridge or range" , "Part of bridge, nine inches" , "Distance or interval between two points" , "Extent of aircraft's wing" .)

I've seen this clue in The Guardian.

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