Some messengers from a German city (5)
I believe the answer is:
essen
'a german city' is the definition.
(city in Germany)
'some messengers from' is the wordplay.
'some' indicates a hidden word (some parts of the word are used).
'ESSEN' is hidden within 'messengers from'.
(Other definitions for essen that I've seen before include "German place name" , "Krupp HQ (Ger.)" , "European city" , "German industrial centre" , "Industrial city of northwest Germany" .)