Oaks refers to a type of tree, specifically the Quercus species, that typically has broad leaves and produces acorns. In the given clue, "London's ___ Park, near Epsom Downs," the missing word might be "Oaks," indicating a park in London near Epsom Downs that is named after or known for its oak trees.
Note: The provided meaning of the answer is for the latest New York Times crossword puzzle clue: Acorn producers. Explanations are generated by AI and may be inaccurate.