Related Clues:

• Either stabs or thumps
• Splits; quips
• Jokes with the chaps
• Fractures bringing torment into the Civil Service
• Begins to tell jokes
• Attempts to solve succeeded
• Split's cold spaces for laying down wine
• Jokes from expert succeeded
• They're how the light gets in, according to Leonard Cohen
• Works out and breaks down
• Finally spills the beans
• Lines that split without breaking apart