Great clues, Jolan. I didn't get to them till after "closing time"; I assumed that 4 was a word for port and tried to think of one that began with ENT, but only came up with entrance, which didn't seem to work. Good solving, Tony.
I hope to get back on your schedule again, and wish it was mountain-climbing that was spoiling the fun (won't be doing that again till mid-August- the White Mountains in Maine). Thanks so much for your efforts, and best to Helen.