Thanks for the comments re REEF, very interesting point about the plural. I really want to improve my clue setting- am beginning to enjoy it more than solving!- so it's good to get constructive feedback. I believe the rolled up part of the sail is also called a reef.
i was pleased Les gave me that word to clue as I am researching mid nineteenth century sailing ships, specially the
Tornado which took emigrants to Australia. How did the crew hold on while tying reef knots?
And yes to the next JE, Les, thanks