1) Bordered 2) Duked it out 3) Emulated Gene Tunney 4) Enclosed in or as if in a box 5) Exchanged some crosses 6) Fought with fists 7) Fought with gloves 8) Hemmed 9) How some chocolate is sold 10) Like a sidebar 11) Like cd sets 12) Like sidebars, often 13) Like some sets 14) Made some rounds 15) Mixed it up with Ali Found on https://www.crosswordclues.com/clue/boxed