Answer:

prohibition

AnswerCrossword Clue
PROHIBITIONPolitical party formed in 1869 that advocates temperance
PROHIBITIONIt officially ended 12-5-33
PROHIBITIONAnti-Saloon League goal
PROHIBITIONBygone era, which will help answer the five capitalized clues
PROHIBITIONDry period, historically