N.M. Indian is a term used to refer to Native American tribes from New Mexico. The four crossword solutions are TAOS, SIA, PIRO, and TANO, which are all Native American tribes from the state. TAOS is a tribe of Native Americans who have lived in the Taos Valley of northern New Mexico for centuries. SIA is a tribe of Native Americans who have lived in the Sandia Mountains of central New Mexico for centuries. PIRO is a tribe of Native Americans who have lived in the Rio Grande Valley of southern New Mexico for centuries. TANO is a tribe of Native Americans who have lived in the Jemez Mountains of northern New Mexico for centuries.