What does the cryptic crossword clue "Note chap composed for commemorative monument (8)" mean?

The definition is "monument". The wordplay uses an anagram. anagram of NOTE + CHAP = CENOTAPH; definition: "monument" The answer is CENOTAPH.

Note chap composed for commemorative monument (8)

Daily Mail Cryptic #17097 | 18 Down | 2023-05-15 flower