Possible Clues:

• Sack young lady after insult
• Sack girl after course has finished early
• Be contemptuous towards teacher — and send her packing
• Throw out
• Refuse to accept part of record is missing
• Final military order received — is mission pared down?
• Deem unworthy of consideration
• Reject, as a theory
• Stump, perhaps, as part of crossword is missing
• Chap turning on female cashier