Dog rests leg in the potty (7,6)
I believe the answer is:
english setter
'dog' is the definition.
(English setter is an example)
'rests leg in the potty' is the wordplay.
'potty' indicates an anagram (potty can mean mad).
'rests'+'leg'+'in'+'the'='restsleginthe'
'restsleginthe' with letters rearranged gives 'ENGLISH SETTER'.
(Other definitions for english setter that I've seen before include "canine" , "One in white coat spotted" , "Breed of dog" , "man responsible for language exam" , "Dog -- serenest light (anag)" .)