Possible Clues:

• Issues an invitation
• One questions if they might be jobs to be done after tea
• The question is could one get this by the hundred in barrels (4)
• Impetrates (with "for")
• Might one work at them after tea with queer ease, by the sound of it?
• Responds ˆ la ''Jeopardy!''
• The question is if a hundred such could hold water
• It's questionable if they might be performed after tea
• What is so questionably silly about potassium
• It's questionable if they might hold drinks by the hundred