74
I bet we invented the word dyslexia so they won't know we're writing about them
(self.showerthoughts)
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. A showerthought should offer a unique perspective on an ordinary part of life.
Relevant XKCD
18 across says “every third letter in the word for “inability to visualise””.
You'd need to figure out what word this is, and then visualise every third letter of it. Which you can't do if you have it!
The word is
AphantasiaSo the answer for 18 across was aaaa?
Yep, the whole crossword puzzle is like that.