Related Clues:

• Welfare factor
• Water, for all
• Really could use
• Absolutely have to have
• If ___ be
• Aid criterion
• Have to get
• It's said to be the mother of invention
• Lack, require.
• '......... is the mother of invention'
• Be in want of
• Have a requirement
• Need, exigency
• Lack or require
• In want of