Thanks, Malone. Curious the preamble is not in the pdf. Here it is…
Anagram Act
In order to solve each clue, solvers must act to unscramble a word that has been anagrammed; first letters of the de-anagrammed words explain what must fill the unclued entries. I was pleasantly surprised to discover Chambers recognises "anagram" as a verb, but "de-anagram" is yet to make it - the petition starts now.