Tenor joins composer for tour (6)
I believe the answer is:
travel
'tour' is the definition.
(thesaurus)
'tenor joins composer' is the wordplay.
'tenor' becomes 't'.
'joins' says to put letters next to each other.
'composer' becomes 'ravel' (I've seen this before).
't'+'ravel'='TRAVEL'
'for' is the link.
(Other definitions for travel that I've seen before include "Pass" , "Varlet (anag.)" , "Locomotion" , "tour" , "Make a journey" .)