Reward for a dog (3)
'reward for a dog' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for treat that I've seen before include "Give medical care or free meal to" , "Nurse" , "Give care to; surprise gift" , "Tend" , "Medicate" .)
(Other definitions for pat that I've seen before include "Touch; name" , "Conveniently; light touch" , "Slick; dab" , "Touch lightly - bit of butter?" , "Small butter piece" .)