Answer: lex

AnswerCrossword Clue
LEXN.Y.C. avenue
LEXSuperman's nemesis Luthor
LEX"Superman" baddie Luthor
LEX"Superman" villain Luthor
LEXLaw, to Caesar
LEXSuperman archenemy Luthor
LEXTarzan portrayer Barker
LEXGene's "Superman" role
LEXSuperman nemesis ... Luthor
LEXEvildoer Luthor of "Superman"
LEXSuperman's archenemy Luthor
LEXAve. paralleling Park
LEX"Smallville" villain Luthor
LEX"The Joy of ..." (Gyles Brandreth book about words)
LEX"The Joy of ..." (book celebrating wordplay)
LEXComic villain Luthor
LEX"The Joy of ..." (Brandreth's celebration of wordplay)
LEXLuthor out to get Superman
LEX"The Joy of ..." (Gyles Brandreth's celebration of wordplay)
LEXComics villain ... Luthor
lexlexicon
LEXNew York City subway, with "the"
LEXSuperman's foe Luthor
LEXLatin word for (hol)l(y) a(nd related flo)w(ers)
LEXSmallville guy
LEXLuthor of Superman villainy
LEXSuperman foe Luthor
LEXSuperman nemesis Luthor
LEXBig Apple ave.
LEXLaw, to Livy
LEX... non scripta (unwritten law)
LEXComics villain Luthor
LEX"Superman" archvillain Luthor
LEXBarker of "La Dolce Vita"
LEXLatin law
LEXBig Apple subway, familiarly, with "the"
LEXFirst name in comics villainy
LEXLuthor of "Superman" comics
LEXArchvillain Luthor
LEX.. scripta: written law