Composer following tenor's progress (6)
I believe the answer is:
travel
'progress' is the definition.
(thesaurus)
'composer following tenor's' is the wordplay.
'composer' becomes 'ravel' (I've seen this before).
'following' is a charade indicator (letters next to each other).
'tenor' becomes 't'.
'ravel' after 't' is 'TRAVEL'.
(Other definitions for travel that I've seen before include "Move from one place to another" , "Locomotion" , "It is said to broaden the mind" , "treatment for a narrow mind?" , "Tourism" .)