Nudges if you need them:
Nudge 1 A clue to the topic of this puzzle can be found as a three-word phrase spanning one of the rows
Nudge 2 Another hint is the two-word phrase found at the first and last across entries
Nudge 3 The clue at 64-across refers to a word that can go “before” the themers, and another word that can go “after” the themers
Nudge 4 Another title for this puzzle could be “A Colorful Presentation”
Also, as much as I admire Justin Rose…. hurray for Rory!!!