Possible Clues:

• Deliberately dawdle
• End of piping with more than ample blue lagging
• A deliberately retarded pace as in industrial action
• Grandfather if neglected may protest
• 'Can't, perhaps, be fasting to do this (2,4)'
• Do things deliberately to annoy the bosses
• Delaying form of industrial action
• Deliberately dawdle over work
• Non-energetic sort of workers' protest?
• Lackadaisical industrial action?