Health club (3)
I believe the answer is:
spa
'health club' is the definition.
(I know that health club can be written as spa)
This is all the clue.
(Other definitions for spa that I've seen before include "A curative mineral spring, or place with one" , "health centre" , "Water-cure town" , "here for the good of his health?" , "Watering place" .)