Related Clues:

• Can't be without
• '-- go!'
• Crave
• It's more than a desire
• Must-have item
• Privation
• Must, slangily
• Was given no alternative
• Beggary
• Impecuniosity
• Food or air
• With 15-Across, need, slangily
• 'I ___ Right to Sing the Blues'
• ''___ I say more?''
• Couldn't help but