A cryptic crossword. If you're unfamiliar with the concept, here's a Wikipedia article: https://en.wikipedia.org/wiki/Cryptic_crossword

You can solve the digital version, using either keyboard, mouse, or both; or download and print the PNG-file and solve it with a pen.

I can't test Mac and Linux versions, but they should work.

Tools used: Construct 3, LibreOffice Calc