Related Clues:

• Cycling hard? This suggests duty or obligation, perhaps
• ___ to (should)
• Must nothing cancel the first of November?
• Take what's offered or get nothing at all
• Has obligation, being hunted to hide head
• 'You ___ to know better'
• Demanding to have top lowered, is obliged
• "This ___ to do the trick"
• 'That ___ to do it'
• Bosh icon's echo (anag) — with only one option!
• Lack of an alternative
• Take what you're offered or get nothing
• 'You ___ to know better!'
• "This __ to be good"
• "You __ to know better"