Is far from green, of course (3)
I believe the answer is:
tee
'course' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see an association between them that I can't see?
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for tee that I've seen before include "Start of a hole in golf" , "Golfing support" , "Golfer's support" , "Where a hole starts" , "Where one drives from" .)