Possible Clues:

• Sounds like something from the cellar that goes with a battery
• Attack violently
• Battery's cousin
• Offensive action
• How offensive a sailor might sound with a battery
• Charge the fool a month in arrears
• Mount an attack
• Thus to 11 across will get one in a pickle, by the sound of it
• A sailor heard making attack
• The kind of battery you'd get in the end of 18 down, by the sound of it