What does the cryptic crossword clue "Flyer left ale to go off (7)" mean?

The definition is "Flyer". The wordplay uses an anagram. anagram of LEFT + ALE = LEAFLET; definition: "Flyer" The answer is LEAFLET.

Flyer left ale to go off (7)

Daily Mail Cryptic #16801 | 27 Across | 2022-03-25 flower