Crossword Genius

Though possibly Adam, right? Under no circumstances (3,4)

Ross

I believe the answer is:

not ever

'adam right? under no circumstances' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'though possibly' is the wordplay.
'though' becomes 'not' (I can't justify this - if you can you should give a lot more credence to this answer).
'possibly' becomes 'ever' (I've seen this before).
'not'+'ever'='NOT EVER'

I've seen this clue in The Guardian.
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