Deleting Regina's mistake (7)

I believe the answer is:

erasing

'deleting' is the definition.
(erasing is a kind of deleting)

'regina's mistake' is the wordplay.
'mistake' is an anagram indicator.
'reginas' with letters rearranged gives 'ERASING'.

(Other definitions for erasing that I've seen before include "obliterating memory" , "Removing" , "Getting rid of" , "Rubbing out" .)

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

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