You might feel that the revealer would have been more in-the-language if it had been HEAVY METAL MUSIC, but Mr. Evans describes why that didn’t happen in his notes below. The original revealer was HEAVY METAL MUSIC. It was rejected because not all the metals in the theme were considered heavy by the editors. My extensive fact-checking before submitting the puzzle (the Wikipedia article on heavy metals) had led me astray! Tin: Heavy or not?

Source: New York Times November 03, 2019 22:52 UTC