Whirlpool bath (7)
I believe the answer is:
jacuzzi
'whirlpool bath' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for jacuzzi that I've seen before include "underwater jet system" , "Whirlpool bathtub with underwater jets" , "Type of bathtub" , "Bath with water jets" , "Massaging bath" .)