Crossword Genius

A cat is off course (6)

Ross

I believe the answer is:

astray

'off course' is the definition.
(to be led astray is to be led off course)

'a cat' is the wordplay.
'cat' becomes 'stray' (stray is a kind of cat).
'a'+'stray'='ASTRAY'

'is' is the link.

(Other definitions for astray that I've seen before include "Off target" , "(Gone) in wrong direction" , "Off one's route or lost" , "Philip -, English twentieth century poet" , "Missing, lost" .)

I've seen this clue in The Daily Express.
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