One running from the front? (8)
I believe the answer is:
deserter
This clue might be a double definition.
'one running' is the first definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'the front?' is the second definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
'from' is the link.
Can you help me to learn more?
(Other definitions for deserter that I've seen before include "Illegal army leaver" , "Turncoat" , "Traitor" , "Defector" , "Military runaway" .)