Crossword Genius

Rook? It's a bird (4)

Ross

I believe the answer is:

gull

I believe this clue is a double definition.

'rook?' is the first definition.
(both can mean to trick)

'a bird' is the second definition.
(gull is a kind of bird)

'it's' is the link.

(Other definitions for gull that I've seen before include "Dupe - aquatic bird" , "Fool - bird" , "Seabird with a raucous call" , "Common seabird" , "Aquatic bird with long pointed wings" .)

I've seen this clue in The Guardian.
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