Tense composer's journeys (7)
I believe the answer is:
travels
'journeys' is the definition.
('travel' can be a synonym of 'journey')
'tense composer's' is the wordplay.
'tense' becomes 't' (abbreviation used in many dictionaries).
'composer's' becomes 'ravels'.
't'+'ravels'='TRAVELS'
(Other definitions for travels that I've seen before include "See 10 Down" , "Voyages" , "and so becomes broad-minded?" , "journeyman's accounts" , "Works as salesman" .)