Possible Clues:

• A horseman put out is an aggressive person
• Perhaps criminal assistant employed by bishop
• Depredator
• Football pro out West
• Condition for invasion by a Viking
• I'd get in a rare invasion with this one
• How offensive A can be in 15 across
• Lone attacker in Oakland?
• I'd get into a rare muddle with the attack he has
• Maker of surprise attack