A stick for a dog (7)
I believe the answer is:
pointer
I believe this clue is a double definition.
'a stick' is the first definition.
(thesaurus)
'a dog' is the second definition.
(pointer is a kind of dog)
'for' is the link.
(Other definitions for pointer that I've seen before include "Suggestion" , "Indicator" , "Sign" , "Tip; dog" , "Gun dog" .)