Hydrotherapy haven (3)
I believe the answer is:
spa
'hydrotherapy haven' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for spa that I've seen before include "here for the good of his health?" , "Resort with mineral water spring" , "town for his health!" , "Health and beauty treatment establishment" , "E.g. Harrogate" .)