Crossword clues for The "S" in 54-Down 3 letters:UFOArea 54 craftLIV54, at the ForumETA54-Across posting: Abbr.IKE54 Across, familiarlyEWE54-Down mateIRSOrg. concerned with the word spelled by the starts of 18-, 24-, 36-, 54- and 59-AcrossTUB54-Across holderOUTSee 54-AcrossEAUSee 54 DownRANEmulated 54 DownRAESee 54 AcrossNORCharter 54 Down memberLIV54, in old RomeSHE54-Across, in EnglishMITSch. whose three initials have longer abbreviated forms hidden in 20, 37 and 54 AcrossPROSee 54-DownXERSee 54-AcrossALEDrink that's an anagram of 54-DownLIVWoman whose lucky number might be 54?MVPYogi Berra, in '51, '54, and '55SKIGet off the 54-DownLIV54, to NeroIANSchrager who co-founded Studio 54YDSStat for 54-DownARTSee 54 Across^ARETESummer in 54 DownSTEBus. address that's an anagram of 54-DownSSTBig bird hidden in 17-, 22-, 33-, 46- and 54-AcrossEGGSee 54-AcrossJETYou might be on one if you do the starts of 20-, 37- and 54-AcrossEPIWith 54-across, anaphylaxis-treatment deviceKEN54-year-old dollNOR54-Down's home: Abbr.ENOCreator of the album "Reflection," which consists of one 54-minute trackSIS54-Across' sibCAR54, for oneLAT54°40', e.g.: Abbr.OHROne of 54 Down, in AachenOPSMother of 54-AcrossONESee 54-AcrossHAMPartner of 54 DownCOP54 Across participantBENSee 54 DownSAMLiterary sidekick introduced in '54ARTWith 54 Across, Jazz Age styleOOHToody's cry on "Car 54 Where Are You?"BROCounterpart of 54 DownBONWith 54-Down, some cracksAGS54 Down and others, brieflyMANSee 54-Down