What does the cryptic crossword clue "Mutton Ethel cooked with him gets to be delicious? (4,2,3,5)" mean?

The wordplay uses an anagram. anagram of MUTTON + ETHEL + HIM = MELTINTHEMOUTH The answer is MELTINTHEMOUTH.

Mutton Ethel cooked with him gets to be delicious? (4,2,3,5)

Daily Mail Cryptic #17123 | 1 Down | 2023-06-20 flower