In the August 1970 and August 1971 Word Ways, Ernst Theimer introduced the charade crossword to readers. The first two paragraphs below, explaining the nature of this puzzle, are repeated from the 1971 article.
"A New Charade Crossword,"
Word Ways: Vol. 16
, Article 14.
Available at: https://digitalcommons.butler.edu/wordways/vol16/iss3/14