Possible Clues:

• Say no more about what I loaned at last
• Like the first 'd' in 'Wednesday'
• Unspeaking
• Inaudible
• Like most Chaplin films
• Like some auctions
• Muted to the max
• Nothing by the sound of what I loaned at last
• 'What I loaned at last, nothing to do with 31 across (6)'
• Say nothing about what is back with a fast time