Answer:

fella

Answer	Crossword Clue
FELLA	Dude
FELLA	Guy, colloquially
FELLA	Mac

FELLA	"The Most Happy .."
FELLA	Bub
FELLA	Guy
FELLA	Buddy
FELLA	"Most Happy ..."
FELLA	Good chap?
FELLA	Guy, informally
FELLA	Chap

FELLA	Gent
FELLA	Guy, slangily
FELLA	Roc-A-... Records (label cofounded by Jay-Z)
FELLA	"The Most Happy ...": Loesser
FELLA	"The Most Happy ..."
FELLA	"The Most Happy .." (Loesser musical)
FELLA	Gal's guy
FELLA	One's beau

FELLA	"The Most Happy ..." (Frank Loesser musical)
FELLA	"Happy" Broadway character.
FELLA	"Most Happy" one.
FELLA	Man in a B'way title.
FELLA	"Most Happy ...."
FELLA	"Most happy" character.
FELLA	"Most Happy" guy
FELLA	River of north Italy

FELLA	Berlin's "A ... with an Umbrella"
FELLA	Loesser's "Most Happy" one
FELLA	"The Most Happy .....": Loesser
FELLA	"Most happy" one
FELLA	"The Most Happy ...."
FELLA	Beau, slangily
FELLA	"The Most Happy ..." (Loesser musical)
FELLA	Happy guy in a musical

FELLA	Hip-hop's Roc-a-... Records
FELLA	Cat
FELLA	Loesser's "The Most Happy ..."
FELLA	Blighter
FELLA	Loesser musical "The Most Happy ....."