Possible Clues:

• Flap on medieval breeches
• A portion from the chippy bag
• Feature of old breeches
• Joky item of music men put on centuries ago
• Medieval male accoutrement for the nether regions
• Code cracked by detective on the tail of classic English item of apparel
• Package paid for by its recipient?
• Bit of fish found in man's pouch
• Pouch once worn by men in the front of tight hose or breeches
• A cut of fish that was 'outstanding' in the area for members?