They shared troughs, perhaps (7,6)

I believe the answer is:

draught horses

'they' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.

'shared troughs perhaps' is the wordplay.
'perhaps' indicates an anagram.
'shared'+'troughs'='sharedtroughs'
'sharedtroughs' is an anagram of 'DRAUGHT-HORSES'.

I've seen this clue in The Guardian.

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