Possible Clues:

• Firm is no merchant holding dubious label
• Unsuitable term I'm withdrawing, amending sermon
• Poorly attached handle has no marks, surrounded by tight one
• What's in erratum is no mere verbal infelicity
• Wrong or unsuitable word for a person or thing
• Mean lad to receive no marks for bad term
• Unfortunate term, as exemplified in public school
• Koala bear, e.g.
• Unsuitable name for a person or thing
• Flying fox or koala bear, say