Test deer confusion with right canine (3,6)
I believe the answer is:
red setter
'canine' is the definition.
(red setter is a kind of canine)
'test deer confusion with right' is the wordplay.
'confusion with' is an anagram indicator.
'right' becomes 'r' (common abbreviation).
'test'+'deer'='testdeer'
'testdeer' mixed up with 'r' makes 'RED SETTER'.
(Other definitions for red setter that I've seen before include "description of evening sun?" , "Pet" , "Gun dog" , "Barker" , "supplier of crosswords to the Daily Worker?" .)