Crossword Genius

Twigs evil must finally change (6)

Ross

I believe the answer is:

wicker

'twigs' is the definition.
(material made from twigs)

I don't understand how the remainder of the clue works.

(Other definitions for wicker that I've seen before include "Willow shoot (work)" , "Plaited or woven twigs" , "Pliant twig, osier" , "Made of flexible twigs" , "Thin canes woven together as material" .)

I've seen this clue in The Guardian.
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