Answer: should

AnswerCrossword Clue
SHOULDFirst word of New Year's Eve song.
should(in laws, directives, etc.) must
should(used in questions)
shouldwill have to or is determined to
shouldpast tense of shall
shouldplan to or intend to
SHOULDHas an obligation to
SHOULD"Would"'s cousin
SHOULD"Would" cousin
SHOULDWould's cousin
SHOULDWord of obligation
SHOULD"How ... I know?!"
SHOULDReally ought to
SHOULD"I .. Care" (Sammy Cahn tune)
SHOULDMust
SHOULDOught to
SHOULD"Auld Lang Syne" starter
SHOULD".. auld ..."
SHOULDIs morally bound to