Possible Clues:

• Wrong-headed financial interest in bottomless pit
• Thirty seconds to collect the post? Wrong
• You've got it wrong so to befog a boy
• Wrong in opinion, judgment etc.
• It's not 4 across to have so befogged a last bit of 33 across
• Sounds as if the girl has helped herself in error
• 'Wrong, misguided (8)'
• Off
• Incorrect
• Wrong to take over from 20 with a Scotsman