Related Clues:

• Joke or muffler - a palindrome
• Rope for restraining animal (6)
• Silence the joke
• At the end of this one is so exasperated that it puts one to sleep at the end of this
• It gets a hold you and puts you to sleep at last
• It might be a tie that would put one to sleep after tea
• That's enough to get a hold on you and put you to sleep at last
• Either way, that'll stop you giving 25 down
• It's so funny it leaves one speechless
• That will get a hold on you and put you to sleep after tea
• That's a funny sort of conversation-stopper
• That'll have you on hold and asleep in the end
• The joke is it's such a conversation-stopper
• This may get a hold on you and put you to sleep after tea
• That will hold one and put one to sleep at last