Question: what is clew of a sail?
Answer: Clew – The corner where the leech and foot connect is called the clew on a fore-and-aft sail. On a jib, the sheet is connected to the clew; on a mainsail, the sheet is connected to the boom (if present) near the clew. ... On a square sail underway, the tack is the windward clew and also the line holding down that corner.