Answer: because

AnswerCrossword Clue
BECAUSE"Abbey Road" song
BECAUSESong by Guy D'Hardelot.
BECAUSESong by Guy d'Hardelot.
BECAUSEFamiliar song by Guy D'Hardelot.
BECAUSEPopular tenor solo.
BECAUSEWheezy answer to "Why?"
BECAUSE"... of You," 1951 hit song
BECAUSEReply to "Why?"
BECAUSE1902 song heard at weddings
BECAUSEPerry Como classic
BECAUSEA woman's reason.
BECAUSEFor the eastern half of Quebec, a utility (7)
BECAUSEA1
BECAUSEAs
BECAUSESpringsteen's "... the Night"
BECAUSE"Abbey Road" ballad
BECAUSERepeated word in "We're Off to See the Wizard"
BECAUSEAbbott and Costello's center fielder
becausefor the reason that
becauseFor the reason that; since
BECAUSE"I don't need a reason"
BECAUSEExplanation introducer
BECAUSE"... it is there?
BECAUSEAll-purpose reason
BECAUSEPart 3 of quote
BECAUSEUnsatisfying response to "Why?"
BECAUSESnarky reply to "Why?"
BECAUSEAll-purpose answer to "Why?"
BECAUSEMore of the quip
BECAUSEExasperated parent's reply
BECAUSEOn account of
BECAUSESince
BECAUSEFor the reason that
BECAUSECENTER FIELDER
BECAUSEFrequently sung at weddings.
BECAUSEShakespeare's Lucetta's reason.
BECAUSESong title, tenor's favorite.
BECAUSEPerry Como favorite.
BECAUSEPopular song often heard at weddings.