Crossword Genius

Of no effect (4)

Ross

I believe the answer is:

null

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

This is the entire clue.

(Other definitions for null that I've seen before include "Without force, validity" , "Useless - nothing" , "Invalid; empty" , "Invalid, void" , "Not valid" .)

I've seen this clue in the Sydney Morning Herald.
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