Crossword clues for Underground. 6 letters:VADOSEOf underground springs: Geol.SEWERSUnderground drain systemsGNEISSWhere underground bands get togetherTUBMANUnderground Railroad leaderCENOTEUnderground reservoir: Sp.HEROINWhat "the man" has for the singer in the Velvet Underground song "I'm Waiting for the Man"GROTTOUnderground chamberSEWERSUnderground waste conduitsBURROWUnderground shelterSECRETUndergroundSEWERSUnderground conduitsRCRUMBUnderground comix pioneerSUBWAYUnderground train lineNETHERUndergroundLEVELAUnderground section of a parking garage, oftenBURIEDUnderground, as treasureTUNNELUnderground routeCAVERNUnderground roomMETROSSome undergroundsCELLARUnderground roomMETROSUndergroundsCAVERNNatural underground chamberCAVERNUnderground chamberBURIESPuts undergroundSTRATAUnderground bands?CELLARUnderground room for wineCELLARUnderground floorTUNNELUnderground passageSEWERSUnderground networkCULKINChild actor with a pizza-themed Velvet Underground cover bandTUBMANUnderground Railroad conductorMAQUISFrench underground in WWIICELLARUnderground port locationWARRENUnderground burrow networkORECARUnderground transportSUBWAYUnderground railroadCANADAUnderground Railroad destinationIMPALATame ______ (antelope-inspired band, which someone featured on CHbeam_me_up_softboi may describe as "totally underground indie music ... you probably haven't heard of them")BURROWGo undergroundSEWERSUnderground sanitation conduitsCICADAOne might live underground for 17 yearsGOPHERUnderground figureMETROSUnderground complexesWARRENUnderground homeSEWAGEUnderground wasteGROTTOUnderground recessMETROSUnderground systemsCRYPTSUnderground tombs (part 5)GNOMESFabled underground treasure guardiansSUBWAYUnderground.