"Oakenclew" - that's interesting. It was always "cluff" round our way - Boggart Hole Clough being one example.

Indeed - my father called it "cluff" when he started there in 1957, but he just followed the locals' pronunciation after a while and used the "clew" pronunciation. Presumably a local dialect - similar to the locals around Heysham (pronounced locally and correctly "Heeshem") who call Heysham Harbour "Yashem Yerber" and go digging for "wazzums" (worms) for bait on the sands!