Possible Clues:

• ___ Meow (Internet meme cat with extremely long fur)
• Officer on his own in pass
• Cavalry V.I.P.
• Officer
• No cello for the officer
• Mustard, for one
• Does he sound as if he's at the heart of the fighting?
• Officer cut off in pass
• North, for one
• One in the corps sounds like one at the core