Crossword clues for the word: BACKCHANNEL The word BACKCHANNEL has appeared as an answer to at least 4 crossword clues on different crossword puzzles. Crossword clues for BACKCHANNEL Showing 1 to 4 of 4 results Clue(s) CBA Covert means of communication ... or what's hiding in the circled letters? Unofficial means of communication Unofficial means of communication, and a hint to each set of circled letters