Joins a course for outdoor sporting types (5)
I believe the answer is:
links
'joins' is the definition.
('link' can be a synonym of 'join')
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for links that I've seen before include "Golf course by the sea" , "Bonds" , "Golf course on sandy ground near a shore" , "(Seaside) golf course - connections" , "Seaside golf course - parts of a chain" .)