Possible Clues:

• George Washington or Ulysses S. Grant
• Not specialised, like army chief
• Pentagon VIP
• Enlarge to become all-encompassing
• Pandemic
• Common Latin types left
• He's rank enough not to be particular
• Not particular in command of 10 across to start with
• Motors or nuisance preceder
• Can he end IRA gats? Hell, no! Je faux!