An indication, to a dog (7)
I believe the answer is:
pointer
I believe this clue is a double definition.
'an indication' is the first definition.
(I've seen this before)
'a dog' is the second definition.
(pointer is a kind of dog)
'to' is the link.
(Other definitions for pointer that I've seen before include "Hint (for a dog?)" , "Indicator" , "Guide" , "Suggestion" , "Smooth-haired game-dog" .)