Conclusion of modernist composer's tour (6)
I believe the answer is:
travel
'tour' is the definition.
(I know this)
'conclusion of modernist composer's' is the wordplay.
'conclusion of' says to take the final letters.
'composer' becomes 'Ravel' (Maurice Ravel).
The final letter of 'modernist' is 't'.
't'+'ravel'='TRAVEL'
(Other definitions for travel that I've seen before include "Move from one place to another" , "Voyage" , "Journey from one place to another" , "It is said to broaden the mind" , "Pass" .)