It’s interesting how a simple word like “oak” in a crossword can point to several different meanings from the tree itself to taste, strength, and symbolism. Clues like this make you look for connections rather than simply recall words. I sometimes create crosswords with SuperColoring too https://www.supercoloring.com/tool/crossword-maker, and this article makes me want to try a puzzle with similar layered clues, perhaps around nature and words with unexpected meanings.