Related Clues:

• Foot-in-mouth incident
• Bollix up
• Blown line
• Mistake on the campaign trail
• Careless mistake
• Campaign-trail blooper
• Big mistake
• Putting one's foot in one's mouth, e.g.
• Execute poorly
• A blunder, faux pas
• A social blunder
• What a mistake to be landed with this, by the sound of it!
• What a mistake not to use the net, by the sound of it! ()
• Sounds as if the part of this is that it's a mistake
• Such a blunder for 12 across to use this, by the sound of it