What does the cryptic crossword clue "Dandy dropping Ecstasy is a failure (3)" mean?

The definition is "failure". The wordplay uses a deletion. DUD (deletion) = DUD; definition: "a failure" The answer is DUD.

Dandy dropping Ecstasy is a failure (3)

Times Cryptic #28615 | 24 Down | 2023-05-29 flower