US sitcom that featured the Tate and Campbell families (4)

I believe the answer is:

soap

(Other definitions for soap that I've seen before include "Popular TV programme (which cleans?)" , "TV programme; cleanser" , "Cleaning substance - melodramatic TV or radio series" , "Cleansing substance" , "If soft, it's used to flatter" .)

I've seen this clue in The Mirror.

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