Crossword Genius

Sneaky on a regular basis? No! (3)

Ross

I believe the answer is:

nay

'no' is the definition.
(I've seen this before)

'sneaky on a regular basis?' is the wordplay.
'on a regular basis?' means one should take alternating letters.
The alternating letters of 'sneaky' are 'NAY'.

(Other definitions for nay that I've seen before include "telling a nicker from a pony?" , "even" , "Negative answer" , "Refusal" , "Denial" .)

I've seen this clue in The Times.
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