Type of seabird others rejected (4)

I believe the answer is:

skua

'type of seabird' is the definition.

I can't explain the remainder of the clue.

(Other definitions for skua that I've seen before include "Auks (anag.)" , "Predatory northern seabird" , "One preying on gulls" , "Arctic seabird" , "Seabird; sounds like pin" .)

I've seen this clue in The Times.

Want a hint initially instead of a full solution? Install my app