Possible Clues:

• Posts for mooring lines
• They stop traffic for those buried by the quayside
• Strong posts on road or quay
• Fat couch potato standing around, causing an obstruction to motorists
• Posts put up backward slob, full of fat
• Traffic stoppers
• Shakespeare's entertaining old lines provided obstacles for those looking for their own way
• Black reformers disposing of initial barriers to progress
• Traffic obstructions creates bit of a stink for learners going to Down peninsula
• Posts on ship or shore for sailors