Possible Clues:

• Force ex-pupil to tell an untruth about George
• Do a 28-Down for
• Accommodate, as a favor
• Favour one make
• Make someone morally bound to do something
• Help old boy cross, road's beginning to heave
• European river heading for Liege is empty - do me a favour!
• Compel one to enter rebuilt Globe
• Morally bind
• Make liquid boil, say, for serving up