Advance nothing new, fighting Germany (6)
I believe the answer is:
onward
'advance' is the definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?
'nothing new fighting germany' is the wordplay.
'nothing' becomes 'o' (looks like zero - 0).
'new' becomes 'n'.
'fighting' becomes 'war'.
'germany' becomes 'd' (international vehicle registration code).
'o'+'n'+'war'+'d'='ONWARD'
Can you help me to learn more?
(Other definitions for onward that I've seen before include "Advance, Christian soldiers, marching as to war" , "Advancing (like Christian soldiers?)" , "Advance like Christian soldiers" , "Going on, advancing" , "progressive" .)