Answer:

MAJOR

Answer	Crossword Clue
MAJOR	Frank Burns, for example
MAJOR	Important
MAJOR	.... League

MAJOR	Not minor
MAJOR	Label one might be called a sellout for signing with
MAJOR	Main course?
MAJOR	Collegian's specialty
MAJOR	Student's specialty
MAJOR	Thatcher's successor
MAJOR	Education declaration
MAJOR	Academic focus

MAJOR	Student's declaration
MAJOR	Extensive
MAJOR	Comparative literature, e.g.
MAJOR	Student's focus
MAJOR	Military bigwig
MAJOR	Student's choice
MAJOR	Computer science, e.g.
MAJOR	Gold oak leaf wearer

MAJOR	Collegian's focus
MAJOR	Captain's superior
MAJOR	College declaration
MAJOR	College choice
MAJOR	Blair's predecessor
MAJOR	College concentration
MAJOR	Collegian's focus subject
MAJOR	Significant

MAJOR	"... League" (Tom Berenger comedy)
MAJOR	Collegian's decision
MAJOR	Barbara or Bowes
MAJOR	College field of study
MAJOR	Rank for "Hot Lips"
MAJOR	Blair is his heir
MAJOR	Very important
MAJOR	Collegian's selection

MAJOR	Hot Lips Houlihan's rank
MAJOR	Principal field of study
MAJOR	The U.S. Open or the Masters
MAJOR	Big-time
MAJOR	Prominent