Related Clues:

• Boring parts
• I's, in fraternity names
• Remains a cert, somehow, close to success
• Pieces' counterparts
• Infinitesimal or tiny amounts, say, principally
• "Iliad" characters
• One ordinary seaman penning thank you letters
• *Celebs generally get longer ones
• Byte divisions
• Tracks down – few surviving remains
• Scraps of paper I'm obliged to include in sort of map
• Little letters?
• Twitch currency
• Parts of a comic's act
• They're next to nothing (except thetas and kappas!)