Sound made by cat to rouse seabird (9)
I believe the answer is:
kittiwake
'seabird' is the definition.
(kittiwake is a kind of seabird)
'sound made by cat to rouse' is the wordplay.
'sound made by' indicates a 'sounds like' (homophone) clue.
'cat' becomes 'kitty' (informal term for a cat).
'to rouse' becomes 'wake' (I've seen this in another clue).
'kitty' sounds like 'kitti'.
'kitti'+'wake'='KITTIWAKE'
(Other definitions for kittiwake that I've seen before include "Bird" , "Small pearl-grey gull" , "A seagull" , "Arctic gull with yellow bill and black legs" , "Oceanic gull" .)