Goes in rags concealing offensive attitude (10)
I believe the answer is:
aggression
'attitude' is the definition.
(I have seen 'warlike attitude' mean 'aggression' so perhaps 'attitude' could also mean 'aggression')
'goes in rags concealing offensive' is the wordplay.
'goes in rags' anagrams to 'AGGRESSION'.
Though, I am unsure how the anagram is indicated.
Can you help me to learn more?
(Other definitions for aggression that I've seen before include "Unprovoked attack" , "Act of aggression,physical force" , "Use of armed force" , "Hostile action" , "Act of hostility" .)