Possible Clues:

• Worked for one's bread
• Dough may be required by the sound of it
• Worked, as clay
• Having made bloomer, perhaps, required to speak out
• Worked into dough with the hands
• Dad struggling with knee, which is massaged
• Like tired muscles at a massage parlor
• Worked before baking
• Exerted pressure, as a cat would with its paws
• Worked in a bakery?