Brindled cat (5)
I believe the answer is:
tabby
'brindled cat' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for tabby that I've seen before include "Brownish-grey cat" , "Brindled cat" , "Mottled and striped grey or brownish cat" , "Domestic cat" , "Brownish cat with dark streaks" .)