Toured Beethoven's Fourth, and French composer conducted (9)
I believe the answer is:
travelled
'toured' is the definition.
(to tour is to travel around)
'beethoven's fourth and french composer conducted' is the wordplay.
'beethoven's fourth' becomes 't' (4th letter of 'beethoven').
'and' says to put letters next to each other.
'french composer' becomes 'ravel' (Maurice Ravel).
'conducted' becomes 'led' ('lead' can be a synonym of 'conduct').
't'+'ravel'+'led'='TRAVELLED'
(Other definitions for travelled that I've seen before include "Journeyed" , "Went on a journey" , "Made a trip" , "was moving" .)