Popular golfer gets round instruction to play slowly
I believe the answer is:
largo
'slowly' is the definition.
(I've seen this before)
'popular golfer gets' is the wordplay.
'gets' indicates the answer is hidden within the clue.
'LARGO' is hidden in the letters of 'popular golfer'.
'round instruction to play' is the link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for largo that I've seen before include "Musical piece" , "taking it steady" , "Key -, Humphrey Bogart film" , "Moderately slowly" , "Slow and dignified, like Handel's composition" .)