COMM definitions

Comm

1) DC agency 2) Ad hoc gp 3) Ad hoc group 4) Rank below a captain, at sea
Found on https://www.crosswordclues.com/clue/comm

---

COMM

Communications
Found on http://www.encyclo.co.uk/visitor-contributions.php

---

comm

Communication
Found on http://www3.sympatico.ca/dhaughey/j1930.htm

---