Sheep in cove hit accidentally (7)
I believe the answer is:
cheviot
'sheep' is the definition.
(I know that Cheviot is a type of domestic sheep)
'cove hit accidentally' is the wordplay.
'accidentally' indicates an anagram (a chaotic or accidental ordering of the letters).
'cove'+'hit'='covehit'
'covehit' with letters rearranged gives 'CHEVIOT'.
'in' is the link.
(Other definitions for cheviot that I've seen before include "One of flock" , "Northumberland hills; sheep" .)