Cleaner sort of opera (4)
I believe the answer is:
soap
This clue is a double definition.
'cleaner' is the first definition.
(I know that soap is a type of cleaner)
'sort of opera' is the second definition.
(soap opera)
(Other definitions for soap that I've seen before include "cake?" , "A cleansing sort of TV serial" , "Serialised drama" , "Cleaner - long-running TV show" , "TV entertainment" .)