Whirlpool bath (7)
I believe the answer is:
jacuzzi
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">whirlpool bath</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(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" .)