Possible Clues:

• Debtor stuffing pennies into faulty socket
• Electric wall socket
• Where you can get charged for presentation
• Starts 15 across with tip - give it a plug, otherwise it's useless
• Microsoft slide show software
• Socket for a presentation system?
• It hurt, plugging a stage socket
• Microsoft Office feature
• One can provide juice that a presenter may require
• Ubiquitous presentation medium