Poetry — she used some magical words (3,6)
I believe the answer is:
hey presto
'some magical words' is the definition.
'hey-presto' can be an answer for 'words' (I have seen 'Magic words ' mean 'hey-presto' so perhaps 'words' could also mean 'hey-presto'). I am not certain of the 'some magical' bit.
'poetry she used' is the wordplay.
'used' indicates an anagram.
'poetry'+'she'='poetryshe'
'poetryshe' is an anagram of 'HEY-PRESTO'.
Can you help me to learn more?
(Other definitions for hey presto that I've seen before include "with the wave of a magic wand!" , "Conjuror's command or exclamation" , "Conjurer's exclamation" , "before your very eyes" , "Cry from magicians" .)