Related Clues:

• Not a breeze
• Troublesome
• Hardly a no-brainer
• How you may find this puzzle
• Mohs scale adjective
• Herculean
• Word that can precede the first word of the six longest puzzle answers
• Like some crosswords
• Tough to crack
• Steellike
• Rocklike
• Tough to solve
• Fast partner
• Unlike a picnic?
• Vexing