Wild cat's course by the sea reported (4)

I believe the answer is:

lynx

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'wild cat's' is the definition.
(wild cat species)

I don't understand how the rest of the clue works.

(Other definitions for lynx that I've seen before include "Keen-eyed feline" , "Member of the cat family" , "Wildcat noted for keen sight" , "Keen-eyed cat" , "One of the wild cats" .)

I've seen this clue in The Times.

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