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INCOMPLETEGRADEI may stand for it ADVENTCALENDARSTheir last windows are opened on Christmas Eve LOSTONESDIGNITYDidn't save face ASANENDINITSELFHow humanity exists, per Kant BOOGIEDOWNBRONXHip-hop's birthplace, colloquially ARMOREDDINOSAURAnkylosaurus, for one BOLTONWANDERERSEccentric wore brand stolen from football club VOICECONTROLLEDSmart, in a way SEEMSREASONABLE"That's not so outrageous" COLORADOSPRINGSDesperately poor lad crossing city HAVETHELASTWORDGet final say in an argument, e.g. INCIDENTALMUSICPopular tune - claim disc misrepresented original theatrical version? PUTAFACETOANAMEFinally meet in person, or how to make the starred clues match their answers LAUGHOUTOFCOURTRefuse to consider some fun, having nowhere to play tennis?