Related Clues:

• Lab equipment, a bit of a pig, heartlessly knocked over
• Reply to send off in terrible ire?
• Answer letters during cruise, throwing odd ones overboard
• Sally having job corking wine? Sling away!
• Pert, so I may deliver one?
• Sally is ready to take in East German
• Sally's current advert editor finally moved to the top
• In some anger, I posted sharp answer
• Clever answer
• Counter with a sharp edge
• Soldier gets wrong answer
• What's concerning about one Internet message and clever reply
• Rotter (anag.)
• Answer sharply still
• Quick witty retort