Possible Clues:

• Unfavourable qualifying terms omit B and E
• Inimical
• It's hard to get this into skeletal form
• Unfavourable of the week
• Opposed - inauspicious - opposite
• Such an advertisement jingle may have the opposite effect
• Disinclined to take daughter in? The contrary!
• Evaders turning hostile
• Served a stew with disastrous result
• Commercial poetry is unfavourable