Journey doesn't start for composer (5)
I believe the answer is:
ravel
'composer' is the definition.
(I've seen this before)
'journey doesn't start' is the wordplay.
'journey' becomes 'travel' ('travel' can be a synonym of 'journey').
'doesn't start' means to remove the first letter.
'travel' with its initial letter removed is 'RAVEL'.
'for' is the link.
(Other definitions for ravel that I've seen before include "Tangle - untangle - French composer, d. 1937" , "Tangle or become tangled" , "note-writer observed" , "Make more complicated - French composer, d. 1937" , "French composer, Maurice (1875-1937)" .)