Defence group distributing guns is not acknowledged (6)
I believe the answer is:
unsung
'defence group' is the definition.
Both the answer and definition are adjectives. Maybe there's an association between them I don't understand?
'distributing guns is not acknowledged' is the wordplay.
I cannot really understand how this works, but
an anagram of 'guns' is 'sung' which is located in the answer.
'not' could be 'un' (prefix meaning 'not') and 'un' is present in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for unsung that I've seen before include "Not honoured" , "Not celebrated or praised" , "Overlooked" , "Not famous or acclaimed, hero perhaps" , "Remarked by no-one" .)