Enter a clue or pattern or both:
The Clue
Copying, with "after" (10 letter answer)
The Answer
PATTERNING
Tags
Notes
The answer PATTERNING is so rare that it appears less than once every 2500 puzzles.
Definition
PATTERN as a verb:
1. (model, pattern) = plan or create according to a model or models
2. form a pattern; "These sentences pattern like the ones we studied before"