Crossword clues for Keys in again:KEYSTeen's Saturday-night request, perhapsKEYEDScratched the surface of?KEYSMusician Alicia ... or her instrumentKEYSWest, Largo, et al.KEYVitally importantKEYTest-grading aidKEYESFlowers for Algernon author DanielKEYWhat a picker doesn't useKEYINGSpreadsheet entry jobKEYWhat a certain signature revealsKEYWhat a signature denotesKEYSBlack ones are sharpKEYSOpeners or startersKEYHelp for 38-Down readersKEYItem brought to a closingKEYSStarting lineup?KEYSFlorida islandsKEYRoller skater's need, onceKEYKind of case or ringKEYSIvories, on a pianoKEY___ LargoKEYSardine can attachmentKEYEDOn edge, with "up"KEYEDTense, with "up"KEYSChain itemsKEYPiano piece?KEYLocker unlockerKEYIt's changed in transposition or modulationKEYSRing janglersKEYSESC, ALT, etc.KEYSSuper's setKEYThe Star-Spangled Banner lyricistKEYALT or ESCKEYEChan films regular ___ LukeKEYEDCross-indexedKEYC major, for the first three minutes of "Love on Top"KEYVitalKEYED____ up (excited)KEYSThey might modulateKEYSLargo and WestKEYSYou might copy a set of them at a hardware storeKEYCrucialKEYHighly importantKEYA capo adjusts itKEYCriticalKEYIt's just for openersKEYRequirement for solving a Vigenère cipherKEYEDAtwitter, with "up"KEYEDDamaged on purpose, as a car doorKEYLock fitter