He’s poetry in motion: that’s magic! (3,6)
I believe the answer is:
hey presto
'that's magic' is the definition.
(a magician might say 'hey presto')
'he's poetry in motion' is the wordplay.
'in motion' indicates an anagram (I've seen this in other clues).
'hes'+'poetry'='hespoetry'
'hespoetry' is an anagram of 'HEY-PRESTO'.
(Other definitions for hey presto that I've seen before include "before your very eyes" , "Just like that" , "Conjurer's exclamation" , "Magic words" , "Spell words" .)