Answer:

OSU

Answer	Crossword Clue
OSU	Buckeyes' sch.
OSU	Buckeye inst. of learning
OSU	Columbus campus

OSU	Columbus coll.
OSU	Where the Graduate grad'd
OSU	Sch. that puts "The" before its name
OSU	Wolverines' archenemy?: Abbr.
OSU	Big Ten sch.
OSU	Big 10 sch.
OSU	Big Ten team
OSU	Columbus sch.

OSU	Learning inst. in Columbus
OSU	Rutherford B. Hayes was one of its trustees: abbr.
OSU	Home of the Buckeyes, for short
OSU	Big Ten inits.
OSU	Michigan rival, in coll. football
OSU	Sch. attended by five Heisman Trophy winners
OSU	Six-time Rose Bowl champs: Abbr.
OSU	The Beavers of the Pac-10

OSU	Home of the NCAA's Buckeyes
OSU	Penn St. rival
OSU	Sch. with a Lima campus
OSU	Jesse Owens's alma mater, briefly
OSU	Largest U.S. campus, enrollment-wise
OSU	Jack Nicklaus's alma mater, briefly
OSU	The Buckeyes, initially
OSU	Buckeyes' home: Abbr.

OSU	Its flagship sch. is in Stillwater, west of Tulsa
OSU	Corvallis sch.
OSU	Home of the Woody Hayes Athletic Ctr.
OSU	Pac-12's Beavers
OSU	The Beavers of the Pac-12
OSU	Tulsa sch.
OSU	Buckeyes' coll.
OSU	Campus at Columbus, briefly

OSU	The Beavers' sch.
OSU	Columbus campus (abbr.)
OSU	Columbus inst.
OSU	The Buckeyes' sch.
OSU	Home of the Cowboys (abbr.)