Average Length: 5.36
CORRECTION: THE CLUE FOR 68 ACROSS SHOULD READ “THREE MAKE AN O”, NOT A T.
The three seeds for this grid were 20, 36, and 57 Across. I started with 20 Across and then 36 Across immediately popped into mind. I had to find a third entry to complement 20 Across and continue the mini-theme, and a couple of minutes’ thought produced 57 Across.
By the way, if you ever get a chance to visit 36 Across, it’s a charming place to spend a few days. I was there last summer after a week hiking in Wales – you can read about it and see additional photos on my PuffinlessTravel blog here and here.