Fluffy toy dog, for short (3)
I believe the answer is:
pom
'fluffy toy dog for short' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for pom that I've seen before include "Pomeranian dog" , "Disparaging term for English immigrants to the Antipodes" , "Australian slang for British migrant" , "Little dog" , "Britisher in Oz" .)