Cruelly, OAPs lash a dog (5,4)
I believe the answer is:
lhasa apso
'dog' is the definition.
(Lhasa apso is an example)
'cruelly oaps lash a' is the wordplay.
'cruelly' indicates an anagram (I've seen this in other clues).
'oaps'+'lash'+'a'='oapslasha'
'oapslasha' anagrammed gives 'LHASA APSO'.
(Other definitions for lhasa apso that I've seen before include "Tibetan breed of dog - a salsa hop (anag)" , "small dog" , "Shown [AT CRUFTS]" .)