In the August 1970 issue of Word Ways, I introduced the reader to the charade crossword puzzle. (Actually, Word Ways readers were introduced to the charade crossword concept even earlier -- see Walter G. Leight's "The Cryptic Crossword" in the May 1968 issue.)
Theimer, Ernst T.
"Another Charade Crossword,"
Word Ways: Vol. 4
, Article 16.
Available at: https://digitalcommons.butler.edu/wordways/vol4/iss3/16