Possible Clues:

• Wordless 'Ouch!'
• This might follow a bad pun
• [That's an old one!]
• The sound of pain has got even more so, by the sound of it
• Pun reaction, often
• Organ (anag) — lament
• Sound displeased
• (That was corny!)
• "Do I have to?" sound
• React to a dad joke