Possible Clues:

• -- selling, the sending of unsolicited goods to potential customers in the hope of making a sale
• Disinclination to act in The Queen with headdress only 60% complete
• Sluggard's problem
• Newtonian concern
• 'Sluggishness, indolence (7)'
• Everything has its moment
• Wanting to be still like this - right one a little there
• Still staying
• Motion (if any) when no external force is applied
• Possible reason to lie in bed all morning