Weaken anew, maybe (4)

I believe the answer is:

wane

'weaken' is the definition.
(thesaurus)

'anew maybe' is the wordplay.
'maybe' is an anagram indicator.
'anew' is an anagram of 'WANE'.

(Other definitions for wane that I've seen before include "Subside; lessen" , "Dwindle" , "Become smaller" , "Diminish" , "Anew (anag.)" .)

I've seen this clue in the Evening Standard.

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