Related Clues:

• Frank
• Follow
• Double curve
• Snoopy, for one
• Trail
• Manx or Persian
• 'The ___ in the Hat' (rhyming Seuss book)
• Track
• Be-bopper
• See 20-Across
• Hipster
• Alley ___
• Worry
• See 53-Across
• Utter failure, in slang