Answer:

STU

Answer	Crossword Clue
STU	Original Beatle Sutcliffe
STU	Erwin of old films
STU	Erwin of early TV

STU	Good name for a cook?
STU	Sutcliffe or Erwin
STU	Actor Erwin
STU	Erwin of old flicks
STU	Erwin or Udall
STU	R-V hookup?
STU	Bridegroom in "The Hangover Part II"
STU	Cook in Creedence Clearwater Revival

STU	WWE Hall of Famer Hart
STU	VW predecessors
STU	One-time Beatle Sutcliffe
STU	Onetime Beatle Sutcliffe
STU	"Rugrats" dad
STU	RV center?
STU	R-V connection
STU	RV interior?

STU	Erwin of old TV
STU	Alphabet fragment
STU	Alphabetical trio
STU	R-V hookup
STU	"The ... Erwin Show" (1950s program)
STU	1950s-60s TV star Erwin
STU	Holcomb who coached for Miami and Purdue
STU	"The ... Erwin Show" (1950s sitcom)

STU	Early Beatles bassist Sutcliffe
STU	Early bandmate of John, Paul, and George
STU	Dentist in "The Hangover"
STU	Poker champ Ungar
STU	Early Beatle Sutcliffe
STU	Apt name for a cook?
STU	Erwin of '50s TV
STU	V preceders

STU	Tommy's dad in "Rugrats"
STU	Disco guy on "The Simpsons"
STU	Old-time actor Erwin
STU	R followers
STU	Poker legend Ungar