Crossword Genius

Bird is engrossed over rook (6)

Ross

I believe the answer is:

raptor

'bird' is the definition.
(raptor is a kind of bird)

'engrossed over rook' is the wordplay.
'engrossed' becomes 'rapt' (synonyms).
'over' becomes 'o' (cricket abbreviation).
'rook' becomes 'R' (chess abbreviation).
'rapt'+'o'+'r'='RAPTOR'

'is' acts as a link.

(Other definitions for raptor that I've seen before include "Harrier possibly" , "Hunter" , "Eagle, hawk, falcon or owl - parrot (anag)" , "Parrot (anag) - bird of prey" .)

I've seen this clue in The Telegraph.
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