R. L. Stevenson, say, put on a course
I believe the answer is:
ascot
'a course' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for ascot that I've seen before include "Place for meeting" , "Town with racecourse" , "Where the Queen often sees racehorses" , "Tie round the neck" , "English racecourse in Berkshire" .)