Colorful carp (3)
I believe the answer is:
koi
'colorful carp' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for koi that I've seen before include "Japanese type of carp" , "Carp; sounds like shy" , "sort of fish" , "Kind of decorative carp" , "Japanese fish" .)