What does the cryptic crossword clue "Cyril and Una at work related to cooking (8)" mean?

The definition is "cooking". The wordplay uses an anagram. anagram of CYRIL + UNA = CULINARY; definition: "cooking" The answer is CULINARY.

Cyril and Una at work related to cooking (8)

Daily Mail Cryptic #17333 | 9 Across | 2024-04-10 flower