Racecourse for salts? (5)
I believe the answer is:
epsom
I believe this is a double definition.
'racecourse' is the first definition.
(I've seen this before)
'salts?' is the second definition.
(as in Epsom salts)
'for' acts as a link.
(Other definitions for epsom that I've seen before include "Mopes around in English horse-racing venue" , "Derby race track" , "Home to the Derby and the Oakes" , "Classic racecourse" , "Downs" .)