Leash may wound terrier (8)
I believe the answer is:
sealyham
'terrier' is the definition.
(I know that Sealyham is a type of Welsh terrier)
'leash may wound' is the wordplay.
'wound' is an anagram indicator (wound can mean twisted or turned around).
'leash'+'may'='leashmay'
'leashmay' anagrammed gives 'SEALYHAM'.
(Other definitions for sealyham that I've seen before include "Dog that rhymes with ..." , "Wire-haired terrier" , "Short-legged terrier" , "A shy male (anag) - dog" , "Hay meals (anag) - kind of terrier" .)