Mickey Mouse's girlfriend (6)
I believe the answer is:
minnie
'mickey mouse's girlfriend' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for minnie that I've seen before include "Mickey Mouse's girl friend" , "Scottish mum" , "eg Mouse, Driver" , "Mickie Mouse's girlfriend" , "- - Mouse, Mickey's mate" .)