What does the cryptic crossword clue "One removed from main cooker? (4)" mean?

The definition is "cooker". The wordplay uses a deletion. CH (synonym="CH") + EF (synonym="main") = CHEF; definition: "cooker?" The answer is CHEF.

One removed from main cooker? (4)

Times Cryptic #28742 | 21 Across | 2023-10-24 flower