(HILLSDALE, N.Y.) – Clarion Concerts features works by Beethoven, Brahms, Schoenfield, and a world premiere by composer Tonia Ko in the first of its Leaf Peeper Concert Series this fall at Hawthorne Valley Waldorf School in Ghent, N.Y., on Saturday, September 10, at 7:30pm. Performers are Edward Arron, cello; Tessa Lark, violin; Jeewon Park, piano;…