Crossword Genius

Hitches small horses (5)

Ross

I believe the answer is:

snags

'hitches' is the definition.
(snagging is a kind of hitching)

'small horses' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'horses' becomes 'nags' (nag is a kind of horse).
's'+'nags'='SNAGS'

(Other definitions for snags that I've seen before include "Unforeseen obstacles" , "Unexpected obstacles" , "Drawbacks" , "Hitches" , "Problems" .)

I've seen this clue in The Mirror.
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