Brandish (4)
'brandish' is the definition.
(wield can mean to brandish or use)
This is all the clue.
(Other definitions for wield that I've seen before include "Use (weapon, authority)" , "Hold and use (a weapon or tool)" , "Handle - manage" , "Brandish a weapon or exert power" , "exercise" .)
'brandish' is the definition.
(I know that brandish can be written as wave)
This is the entire clue.
(Other definitions for wave that I've seen before include "Shake a hand in the air" , "may have a crest at the top?" , "Make hair curl" , "Flourish" , "Undulating curve" .)