Possible Clues:

• Trail despoils, they say, after time
• Long walk one's taken in some built-up London area
• Parties involved in laborious walk
• Tramp disrupted parties
• Plod on, though tips are uncertain
• Toddle along to wild parties
• Plod ambushes catching one with Ecstasy
• Pirates at sea make slow progress
• A priest worried by tramp
• One in grass endlessly rolling over is tramp