Bird’s audible celebration of cat’s passing? (9)
I believe the answer is:
Here is my best explanation:
'bird's' is the definition.
(kittiwake is a kind of bird)
I can't explain the remainder of the clue.
(Other definitions for kittiwake that I've seen before include "Arctic gull with yellow bill and black legs", "Small pearl-grey gull", "Oceanic gull" and "A seagull".)