What does the cryptic crossword clue "Bedding edge will do for mother, they say (9)" mean?

The wordplay uses a homophone (sounds like). Homophone of “mattress side”, with the homophone at the wrong end of the clue The answer is MATRICIDE.

Bedding edge will do for mother, they say (9)

Guardian Cryptic #29173 | 17 Down | 2023-09-12 flower