distinguishing characteristic

HALLMARK
WordClue
TRAITcharacteristic, tendency
QUALITYcharacteristic, attribute
TYPICALcharacteristic, specific
SPECIFICdistinguishing attribute or quality
TENDENCYcharacteristic, mannerism
ATTRIBUTEcharacteristic or quality of a thing
EXCLUSIVEcharacteristic
SIGNATUREcharacteristic, exclusive
TRADEMARKcharacteristic
SPECIFICdistinguishing attribute or quality
ILLUSIONdistortion of the senses