Enter a clue or pattern or both:
The Clue
In a proficient manner (8 letter answer)
The Answer
EXPERTLY
Tags
Notes
The answer EXPERTLY is so rare that it appears less than once every 2500 puzzles.
Related Clues
With high skill
As an old hand
Definition
EXPERTLY as an adverb:
1. (expertly, like an expert) = in an expert manner; "he repaired the TV set expertly"