Rejects James, perhaps, after overturning snowmobile? (7)

I believe the answer is:

disowns

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'rejects' is the definition.
(to disown is to reject or spurn)

'james perhaps after overturning snowmobile?' is the wordplay.
'james perhaps' becomes 'Sid' (as in actor Sid James).
'after overturning' is a reversal indicator.
'snowmobile?' becomes 'owns' (I can't justify this - if you can you should believe this answer much more).
'sid' reversed gives 'dis'.
'dis'+'owns'='DISOWNS'

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(Other definitions for disowns that I've seen before include "Refuses to acknowledge" , "Has nothing to do" .)

I've seen this clue in The Independent.

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