So returning with order for special troops (9)
I believe the answer is:
commandos
'special troops' is the definition.
The answer and definition can be both groups as well as being plural nouns.
Perhaps you can see an association between them that I can't see?
'so returning with order' is the wordplay.
'returning' shows that the letters should be reversed in order.
'with' means one lot of letters go next to another.
'order' becomes 'command' (commanding is a kind of ordering).
'so' written backwards gives 'os'.
'os' after 'command' is 'COMMANDOS'.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for commandos that I've seen before include "special service troops" , "Soldiers trained for raids" .)