Martin Crane's dog (5)
I believe the answer is:
eddie
'martin crane's dog' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for eddie that I've seen before include "Little Edward" , "The Eagle perhaps" , "- Izzard, stand-up comic" , "-- the Eagle, ski jumper" , "-- Grundy (The Archers)" .)