Place to be pampered (3)
'place to be pampered' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for spa that I've seen before include "Cheltenham or Bath?" , "Boston" , "well" , "town for his health!" , "Water-cure town" .)
(Other definitions for spare that I've seen before include "This tyre around the middle is fat" , "Surplus to requirements" , "Thin; left over" , "This tyre is for emergencies" , "With no excess fat" .)