Two music-makers dance (8)
I believe the answer is:
This might be a double definition.
'two music' is the first definition.
'hornpipe' can be an answer for 'music' (hornpipe is a kind of music). I'm not sure about the 'two' bit.
'makers dance' is the second definition.
'hornpipe' can be an answer for 'dance' (hornpipe is a kind of dance). I am not sure about the 'makers' bit.
Can you help me to learn more?
(Other definitions for hornpipe that I've seen before include "Obsolete instrument: naval dance" , "Lively jig" , "piece of music for an > old dance" , "Lively solo dance associated with sailors" , "Lively old sailors' dance" .)