ARRAU

Set to 3 different clues across 13 published puzzles, most often “Pianist Claudio” — The New York Times, Wednesday, 28 April 2010.

5 letters

Every clue on record, most used first

Pianist Claudio11 times
The New York Times — Wednesday, 28 April 2010
He recorded all 32 Beethoven piano sonatas in the 1960sonce
The New York Times — Saturday, 11 July 2009
Concert pianist Claudioonce
The New York Times — Wednesday, 8 December 1999