Related Clues:

• That's a marathon, ongoing exercise, it seems
• The Marathon, perhaps?
• Fight carrying on continuously
• Continuing feud
• Exercise supported by British PM almost becomes indecisive skirmish
• Military engagement whilst on the move
• Moving engagement
• Sussex council's task is a never-ending struggle
• Management takes action in drawn-out dispute
• Role of armchair general in skirmish
• Continuing skirmish
• Ongoing conflict between managers?
• Persistent confrontation