Possible Clues:

• Fail to take advantage of col?
• Neglect to serve Dad's drink
• Miss finds fool in youngster
• Ignore youngster eating a little horse
• Neglect old man's drink
• Neglect the old man's drink
• Refuse to get secretaries drink
• Let go, as an opportunity
• Decline the opportunity to all raise kitty at a push initially
• Don't take opportunity to succeed at university