New roadmen returning notice group of stars (9)
I believe the answer is:
andromeda
'group of stars' is the definition.
(Andromeda is a constellation)
'new roadmen returning notice' is the wordplay.
'new' indicates an anagram.
'returning' says the letters should be written in reverse.
'notice' becomes 'ad' (both can mean an advertisement).
'ad' written backwards gives 'da'.
'roadmen' is an anagram of 'androme'.
'androme'+'da'='ANDROMEDA'
(Other definitions for andromeda that I've seen before include "Constellation; bog rosemary" , "Greek maid seen in Milan" , "Moan, dread about princess rescued by Perseus" , "Adored man on constellation with great spiral nebula" , "she was given a starring role" .)