Better arrangement of wires (5)

I believe the answer is:

wiser

'better' is the definition.
(thesaurus)

'arrangement of wires' is the wordplay.
'arrangement of' indicates an anagram.
'wires' anagrammed gives 'WISER'.

(Other definitions for wiser that I've seen before include "improving taste?" , "A little more sage" , "More judicious" , "More sagacious" , "Having learned one's lesson?" .)

I've seen this clue in the Evening Standard.

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