He waves the wand about again (6)
I believe the answer is:
andrew
'he' is the definition.
(I've seen this before)
'waves the wand about again' is the wordplay.
'waves' is an anagram indicator (I've seen 'waving' mean this (letters wave around)).
'about' means one lot of letters goes inside another.
'again' becomes 're' (prefix meaning 'again').
'wand' anagrammed gives 'andw'.
'andw' placed around 're' is 'ANDREW'.
(Other definitions for andrew that I've seen before include "holy man" , "Warden (anag.)" , "apostle" , "Wander (anag)" , "Scotland's patron saint" .)