Crossword Genius

New start for fool, having no legal standing (4)

Ross

I believe the answer is:

null

'having no legal standing' is the definition.
(null can mean invalid)

I don't understand how the remainder of the clue works.

(Other definitions for null that I've seen before include "Amounting to nothing" , "Lacking any legally binding force" , "Invalid - not binding" , "Not valid" , "Of no effect, value" .)

I've seen this clue in The Guardian.
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