A stick for the dog (7)
I believe the answer is:
pointer
This clue is a double definition.
'a stick' is the first definition.
(thesaurus)
'the dog' is the second definition.
(pointer is a kind of dog)
'for' acts as a link.
(Other definitions for pointer that I've seen before include "Arrow" , "under control of mouse" , "something moved by mouse" , "Dog; cursor" , "The dog provides an indication" .)