Crossword clues for The "S" in 54-Down 3 letters:LTS54 Down officersRANEmulated 54 DownSKIGet off the 54-DownJETYou might be on one if you do the starts of 20-, 37- and 54-AcrossENOCreator of the album "Reflection," which consists of one 54-minute trackOHROne of 54 Down, in AachenMITSch. whose three initials have longer abbreviated forms hidden in 20, 37 and 54 AcrossUFOArea 54 craftDAI___ Burger, rapper with the 2014 mixtape "In Ya Mouf!" (hint: looks like a singular form of 54-Down)EWE54-Down mateSHE54-Across pronounTUB54-Across holderBOBShort haircut, and a hint to 17-, 25-, 43- and 54-AcrossEAUSee 54 DownBROCounterpart of 54 DownAPE54-Down's ancestorPROSee 54-DownMVPYogi Berra, in '51, '54, and '55ETA54-Across posting: Abbr.LIVWoman who's 54?ETESummer in 54 DownSSTBig bird hidden in 17-, 22-, 33-, 46- and 54-AcrossIRSOrg. concerned with the word spelled by the starts of 18-, 24-, 36-, 54- and 59-AcrossIDOBrief 54-DownKEN54-year-old dollLAT54°40', e.g.: Abbr.ONESee 54-AcrossOUTSee 54-AcrossSIS54-Across' sibCAR54, for oneBONWith 54-Down, some cracksOPSMother of 54-AcrossXERSee 54-AcrossALEDrink that's an anagram of 54-DownLIVWoman whose lucky number might be 54?AGS54 Down and others, brieflyATEPast and anagram of 54-DownCAR___ 54, Where Are You?IANSchrager who co-founded Studio 54YDSStat for 54-DownLIV54, to NeroLIV54, at the ForumSTEBus. address that's an anagram of 54-DownARTSee 54 Across^ARIKE54 Across, familiarlyKOIJapanese 54-DownEPIWith 54-across, anaphylaxis-treatment deviceEGGSee 54-AcrossNOR54-Down's home: Abbr.ORR54 Down great