Ah. Thanks for the clarification and apologies for my own misinterpretation. EDIT: FWIW I think in this case the origin is just "opposite of 'defensive'" as in

Ah. Thanks for the clarification and apologies for my own misinterpretation. EDIT: FWIW I think in this case the origin is just "opposite of 'defensive'" as in "offense & defense" in sports..red & blue teams, etc.