Crossword clues for Subject of this puzzle's theme:SYLVESTERAnimated character who's the subject of this puzzle's themeIOUSubject of this puzzle's themeHOFSTADTERPulitzer Prize-winner Douglas whose three famous subjects are hidden in this puzzle's theme answersTOYOTAMake of six models that are subject to recall ... and being sent back inside this puzzle's theme entriesSTEMCELLSSubject of some medical research ... or a description of this puzzle's theme?H&RBLOCKSubject of the Final Jeopardy! question that knocked out Ken Jennings after a record 74 wins ... or a hint to this puzzle's theme