Horse controls (5)

I think it could be either:

reins

roins

'horse controls' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for reins that I've seen before include "Horse's controls" , "Means of control for a horse" , "Harnesses" , "Rider's straps" , "They're used to control" .)

I've seen this clue in The Mirror, the King Feature Syndicate and the Evening Standard.

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