Possible Clues:

• Bike, confusing device
• A muddy muddler?
• Special constable, one walking or one on motorcycle
• No poacher of eggs clambers around rook
• Telephone equipment needed by oddly sick walker
• Telephone security device
• One hurrying to take off security device
• Motorcyclist's piece of electronic equipment
• Motor cyclist egged on?
• He clambers on the rocks and runs