Course for a singer (5)
I believe the answer is:
tenor
I believe this is a double definition.
'course' is the first definition.
(I've seen this before)
'singer' is the second definition.
(I know that tenor is a type of singer)
'for a' is the link.
(Other definitions for tenor that I've seen before include "theme" , "Placido Domingo, say" , "Voice classification of Jose Carreras" , "Male singer with high-pitched voice" , "Singer; drift" .)