1) American musical trio 2) Atari arcade game 3) Jam band
Found on
https://www.crosswordclues.com/clue/gravitar
Gravitar is a shoot `em up arcade game released by Atari, Inc in 1982. It was the first of over twenty games Mike Hally designed and produced for Atari, including Star Wars. The main programmer was Rich Adam and the cabinet art was designed by Brad Chaboya. The game was a success. With an estimated over 5,427 Arcade Cabinets being distributed. ==....
Found on
http://en.wikipedia.org/wiki/Gravitar
No exact match found.
