Germany has courses for operators of vehicles (7)
I believe the answer is:
drivers
'operators of vehicles' is the definition.
'drivers' can be an answer for 'operators' (driver is a kind of operator). I am unsure of the 'of vehicles' bit.
'germany has courses' is the wordplay.
I cannot quite see how this works, but
'germany' could be 'd' (vehicle registration code for Deutschland) and 'd' is found within the answer.
The remaining letters 'rivers' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'for' is the link.
Can you help me to learn more?
(Other definitions for drivers that I've seen before include "Motoring" , "Motorists; clubs" , "Chauffeurs" , "People taking cars" , "Golf clubs" .)