characteristic, exclusive

SIGNATURE
WordClue
TRAITcharacteristic, tendency
QUALITYcharacteristic, attribute
TYPICALcharacteristic, specific
HALLMARKdistinguishing characteristic
SPECIFICcharacteristic
TENDENCYcharacteristic, mannerism
TRIANGLEBermuda or right
ATTRIBUTEcharacteristic or quality of a thing
AUTOGRAPHsignature
EXCLUSIVEcharacteristic
RECTANGLEquadrilateral with four right angles
STARBOARDright
TRADEMARKcharacteristic
QUALITYcharacteristic, attribute
TENDENCYcharacteristic, mannerism