Offensive person’s secure trade to grab everything (8)
I believe the answer is:
hedgehog
'offensive person's secure trade' is the definition.
I can't tell whether this defines the answer.
'to grab everything' is the wordplay.
'to' becomes 'hedge' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'grab everything' becomes 'hog' (I've seen this in another clue).
'hedge'+'hog'='HEDGEHOG'
Can you help me to learn more?
(Other definitions for hedgehog that I've seen before include "Urchin" , "Nocturnal mammal" , "Spiny mammal" , "Prickly mammal" , "Prickly rodent" .)