A lost dog? Wrong! (6)

I believe the answer is:

astray

'wrong' is the definition.
(I've seen this in another clue)

'a lost dog?' is the wordplay.
'lost dog?' becomes 'stray' (I've seen this in another clue).
'a'+'stray'='ASTRAY'

(Other definitions for astray that I've seen before include "Going wrong" , "(Gone) off course" , "Go . . . . . . - get lost" , "wrong way" , "Wandering off the track" .)

I've seen this clue in the Evening Standard.

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