Bobby -, US chess player who defeated Boris Spassky at the 1972 world championship (7)

I believe the answer is:

fischer

(Other definitions for fischer that I've seen before include "Champion mater" , "Bobby --, chess champion" , "one successful on board" , "Bobby ... US chess master" , "Genius on board" .)

I've seen this clue in The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.