Answer:

bigtime

Answer	Crossword Clue
BIGTIME	"Very much so ..."
BIGTIME	Highest level
BIGTIME	Highest level in a profession

BIGTIME	In a major way
BIGTIME	Highest level in vaudeville.
BIGTIME	Major-league baseball: Slang.
BIGTIME	Top banana's milieu.
BIGTIME	Major-league
BIGTIME	Great thing to hit
BIGTIME	Very much
BIGTIME	Highly successful: sl.

BIGTIME	Major