Crossword puzzle clue "puzzle solved without pen or pencil"

Puzzle solved without pen or pencil

Puzzles solved with a pencil

Write without pen or pencil

Writes without pen or pencil

"Puzzle solved"

Sir Edward Elgar composition whose title has never been solved ... and a hint to this puzzle's circles

Comics character who once, surprisingly, solved a sudoku puzzle

Image depicted by this puzzle, after it's solved