What does the cryptic crossword clue "Men go away, saying: … (5)" mean?

The definition is "saying: …". The wordplay uses an anagram. anagram of MEN + GO = GNOME; definition: "saying: …" The answer is GNOME.

Men go away, saying: … (5)

Guardian Cryptic #25410 | 16 Across | 2011-08-25 flower