Current ball supporters (4)

I believe the answer is:

tees

This clue is a double definition.

'current' is the first definition.
(River Tees is a current)

'ball supporters' is the second definition.

(Other definitions for tees that I've seen before include "Sides of Trent" , "Northern river" , "Current" , "Sport items" , "River of north-east England" .)

I've seen this clue in The Guardian.

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