Loose gun supplying a feud, breaking across financial centre (10)
I believe the answer is:
unfastened
'loose' is the definition.
(synonyms)
'gun supplying a feud breaking across financial centre' is the wordplay.
I cannot really understand how this works, but
'gun' could be 'sten' (British sub-machine gun) and 'sten' is found in the answer.
'a' is present in the answer.
The remaining letters 'unfed' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for unfastened that I've seen is " Undone".)