Now ape fashioned aggressive tool (6)
I believe the answer is:
weapon
'aggressive tool' is the definition.
'weapon' can be an answer for 'tool' (I have seen 'Offensive tool ' mean 'weapon' so perhaps 'tool' could also mean 'weapon'). I am unsure of the 'aggressive' bit.
'now ape fashioned' is the wordplay.
'fashioned' indicates anagramming the letters.
'now'+'ape'='nowape'
'nowape' with letters rearranged gives 'WEAPON'.
Can you help me to learn more?
(Other definitions for weapon that I've seen before include "Gun, say?" , "A tool for inflicting injury" , "Thing used in conflict, gun or knife" , "Thing used to cause bodily harm" , "Thing used to hurt, like gun, knife, bomb etc" .)