Possible Clues:

• Ought, with hesitation, to take responsibility
• Edible part of lamb or bear
• Bear ought to be scratching head by river
• Ought to get 'er armed in the end
• Ought 'er to be so armed?
• Old usher, oddly, is part of the body
• See 1
• Oughter be armed, perhaps
• It's hard to make motorways safer for drivers
• See 10