What does the cryptic crossword clue "Part of spectrum in glaze of certain pottery (4)" mean?

The definition is "of certain pottery". The wordplay uses a hidden word. Hidden in "part of spectruM IN Glaze of certain pottery" The answer is MING.

Part of spectrum in glaze of certain pottery (4)

Times Cryptic #29225 | 25 Across | 2025-05-09 flower