What does the cryptic crossword clue "Banner seen from a mile off (9)" mean?

The definition is "Banner". The wordplay uses an anagram. anagram of FROM + A + MILE = ORIFLAMME; definition: "Banner" The answer is ORIFLAMME.

Banner seen from a mile off (9)

Guardian Cryptic #23870 | 23 Across | 2006-09-13 flower