Bathroom bar (4)
I believe the answer is:
soap
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bathroom bar</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for soap that I've seen before include "It has detergent properties" , "Washing aid" , "Cleaning substance - melodramatic TV or radio series" , "TV programme - sudsy bar" , "Popular TV programme (which cleans?)" .)