Cleanser (4)
'cleanser' is the definition.
(soap is a kind of cleanser)
This is the entire clue.
(Other definitions for soap that I've seen before include "Sudsy TV show?" , "made in a bar?" , "TV programme; wash" , "Cleaning agent" , "Cleaning substance - melodramatic TV or radio series" .)
'cleanser' is the definition.
(I know that detergent is a type of cleanser)
This is all the clue.
(Other definitions for detergent that I've seen before include "Synthetic cleaning substance for washing machines" , "Get tender (anag)" , "cleaner" , "Cleansing solvent" , "help with the washing-up" .)