Possible Clues:

• The burden of this is upon you and me
• Burden that's taken over by one of the big powers
• Burden is, the light globe is back to front
• Load from tip heading off
• No opening for extra responsibility
• It's a responsibility to be supported by America
• Word from the Latin for 'burden'
• Duty — and where so often it seems to lie?
• Difficult responsibility or burden
• Tough, heavy burden