Enter a clue or pattern or both:
The Clue
Adverb in a countable series (7 letter answer)
The Answer
THIRDLY
Tags
Notes
The answer THIRDLY is so rare that it appears less than once every 2500 puzzles.
Definition
THIRDLY as an adverb:
1. (third, thirdly) = in the third place; "third we must consider unemployment"