Answer: gravamen

AnswerCrossword Clue
GRAVAMENEssential part of a complaint, in law.
GRAVAMENBasis of a grievance
GRAVAMENGrounds for legal action
gravamengrievance
gravamenthe part of an accusation that weighs most heavily against the accused; the substantial part of a charge or complaint
gravamenthe most serious part of an accusation