Enter a clue or pattern or both:
The Clue
Org. that fought Napster (4 letter answer)
The Answer
RIAA
Tags
Notes
The answer RIAA is so rare that it appears less than once every 2900 puzzles.
Related Clues
Gold-certifying grp.
Fighter of pirates, in brief
Org. that certifies gold and platinum
Org. that combats illegal file sharing