Where you may see golfers run out in great quantity (5)
I believe the answer is:
troon
'where you may see golfers' is the definition.
(Royal Troon Golf Club)
'run out in great quantity' is the wordplay.
'run out' becomes 'ro' (cricket abbreviation).
'in' means one lot of letters goes inside another.
'great quantity' becomes 'ton' (**).
'ro' going inside 'ton' is 'TROON'.
(Other definitions for troon that I've seen before include "Ayrshire golf course" , "West Scottish town with links" , "A royal Scottish golf club" , "Clyde port" , "Open home" .)