Possible Clues:

• Having wrapped up, I left in to be posted
• Shut up
• Pioneering ecological book is back, fast bound
• This lacks sound
• Like many old movies
• What's sent about 150 is no good to 2 down
• What is quite unsound is up on loan
• Having nothing to declare
• Unspeaking.
• '-- night, holy night' (carol)