Dial in the bathroom (4)
I believe the answer is:
soap
'dial in the bathroom' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for soap that I've seen before include "cake?" , ". . . . opera, sentimentalised radio or tv series" , "Day-to-day TV series" , "Long running TV series" , "It has detergent properties" .)