Related Clues:

• Putting one's foot in one's mouth, e.g.
• Bloomer
• 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
• Huge blunder
• Embarrassing error
• Big blunder
• Solecism committed with fawning affectation
• Boss has no right to make blunder
• Boss endlessly making faux pas
• Bloomer reported by Dario and Dad?