Fall in support on course for novice (7)
I believe the answer is:
trainee
'novice' is the definition.
(trainee is a kind of novice)
'fall in support on course' is the wordplay.
'fall' becomes 'rain' (raining is a kind of falling).
'in' means one lot of letters goes inside another.
'support on course' becomes 'tee' (golf tee on a golf course).
'rain' going within 'tee' is 'TRAINEE'.
'for' is the link.
(Other definitions for trainee that I've seen before include "21 [TYRO]" , "Apprentice" , "Student" , "As pupil" , "Person under instruction" .)