Magic word for a tempo (6)
I believe the answer is:
presto
This clue is a double definition.
'magic word' is the first definition.
(I've seen this in another clue)
'for a tempo' is the second definition.
(musical tempo)
(Other definitions for presto that I've seen before include "Hey, quickly for a magician" , "Poster (anag.)" , "Hey ..., according to the magician" , "rapidly" , "In a quick tempo (music)" .)