Crossword Genius

Deny wife leaving prison (6)

Ross

I believe the answer is:

negate

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'deny' is the definition.
(I know that deny is a more specific form of the action negate)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for negate that I've seen before include "Make invalid" , "disallow!" , "Cause to have no effect" , "Deny the truth of" , "Render null or disprove" .)

I've seen this clue in The Sun.
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