It's me dog! (6)
I believe the answer is:
setter
I believe this clue is a double definition.
'it's me' is the first definition.
(the person that set this crossword)
'dog' is the second definition.
(setter is a kind of dog)
(Other definitions for setter that I've seen before include "A dog trained to stand still when it scents game" , "who is giving you problems right now?" , "Puzzle creator" , "pointer" , "Hunting dog" .)