Related Clues:

• Have some catching up to do
• Keep tabs on
• Hiking route
• Kohoutek feature
• Kite attachment
• It can be lonesome
• Spoor
• Little brother, maybe
• Kite stabilizer
• Bird part
• Skier's course
• Investigator, at times
• Part of 10-Across
• Come in second
• Guinea pig's lack