What does the cryptic crossword clue "Cancelling tunnel man dug up (9)" mean?

The definition is "Cancelling". The wordplay uses an anagram. anagram of TUNNEL + MAN = ANNULMENT; definition: "Cancelling" The answer is ANNULMENT.

Cancelling tunnel man dug up (9)

Independent Cryptic #11684 | 11 Across | 2024-03-22 flower