Understand, as coined in 1961’s “Stranger in a Strange Land”

As a detective trying to solve the crossword clue “Understand, as coined in 1961’s ‘Stranger in a Strange Land'”, I first noted the reference to the book title which immediately gave me a starting point. “Stranger in a Strange Land” was written by Robert A. Heinlein and was a sci-fi novel exploring the notion of a human raised by Martians. The book was known for introducing new slang to the language, and the term “grok” stood out as one of them. “Grok” was coined by Heinlein in this novel and essentially means to fully understand something to the point of having an emotional connection to it. With these insights, it became clear that “grok” was the word we were looking for, satisfying the puzzle’s clue and leading me to success in the mystery.