Enter a clue or pattern or both:
The Clue
Editorial activity (10 letter answer)
The Answer
ANNOTATING
Tags
Notes
The answer ANNOTATING is so rare that it appears less than once every 2500 puzzles.
Definition
ANNOTATING as a noun:
1. (annotation, annotating) = the act of adding notes
ANNOTATE as a verb:
1. (annotate, footnote) = add explanatory notes to or supply with critical comments; "The scholar annotated the early edition of a famous novel"
2. (gloss, comment, annotate) = provide interlinear explanations for words or phrases; "He annotated on what his teacher had written"