Possible Clues:

• Like the first 'd' in 'Wednesday'
• 'What I loaned at last, nothing to do with 31 across (6)'
• Nothing by the sound of what I loaned at last
• Listen in order to be quiet
• Like Tom Mix flicks
• Mum worked as librarian perhaps behind one's back
• Nothing at all, by the sound of it
• Listen, being speechless after 10 across
• Nothing, by the sound of it
• It sounds nothing and is up and over the fast time