Music from some traveller on doorstep (5)
I believe the answer is:
rondo
'music' is the definition.
(rondo is a kind of music)
'some traveller on doorstep' is the wordplay.
'some' indicates the answer is hidden within the clue (some parts of the word are used).
'RONDO' can be found hidden inside 'traveller on doorstep'.
'from' acts as a link.
(Other definitions for rondo that I've seen before include "Music form with repeating theme" , "Last movement of a sonata or concerto" , "Type of movement" , "Musical composition with a recurring theme" , "Music with repeated refrains" .)