Possible Clues:

• Does once make orthographical mistake
• ''The lady __ protest too much''
• I've made a mistake keeping last of ruminant does from those over the hill
• "The lady ___ protest too much ..."
• 'How ___ the little crocodile...': Carroll
• "The lady __ protest too much": "Hamlet"
• Obsolete auxiliary
• ''How ___ the little busy bee ...''
• An old-fashioned do
• 'How then ___ he now see?': John 9:19