Answer: proof

AnswerCrossword Clue
PROOF

Geometry-class exercise

PROOF

Validation

PROOF

Evidence

PROOF
Verification
PROOF
Smoking gun
PROOFSmoking gun, say
PROOFGeometry assignment
PROOFJury-swaying evidence
PROOFPlace for corrections
PROOFCase strengthener
PROOFCheck for typos
PROOFIt's rarely over 100
PROOFLogic exercise
PROOFPortrait studio preview
PROOFSmoking gun, so to speak
PROOFEvidence, or word that can follow the starts of answers to starred clues
PROOFSmoking gun, e.g.
PROOFProsecutor's burden
PROOFAdvanced math assignment
PROOFSpirits measure
PROOFWhiskey bottle word
PROOFSufficient evidence
PROOFTheorem ending
PROOFConclusive evidence
PROOFEvidence that establishes the truth of something
PROOFMath homework assignment
PROOFPre-Publications reading
PROOFGumshoe's quest
PROOFIndisputable evidence
PROOFUndeniable evidence
PROOFQED preceder
PROOFRye-bottle word
PROOFScotch statistic
PROOFVodka-bottle word
PROOFDecisive evidence
PROOFNumber of spirits?
PROOFDavid Auburn play that won the 2001 Pulitzer
PROOFA trial print from a negative.
PROOFThe result of evidence.
PROOFTest print.