Possible Clues:

• Horse race — trees
• Grown acorns
• Tara's neighbor, Twelve ---
• A classic example of 27 across in wood
• Fair ___ (Civil War battle site)
• Dumbarton ___ (D.C. estate)
• Kentucky ___ (pre-Derby race)
• Squirrel haunts, perhaps
• ''Neath the ___' (Wellesley school song)
• Quercine trees