set length and letters 2345678910+ remove filter▲ length12345678910111213141516171819202122232425 Answer FLASHMOB – Crossword Puzzle Solver clueanswerlengthSpontaneous gathering, and a hint to the starts of 17-, 23-, 37- and 48-AcrossFLASHMOB 8 Virtually assembled group that performs confusing actionsFLASHMOB 8 Spontaneous assembly often organized onlineFLASHMOB 8 Sudden assembly that some find entertainingFLASHMOB 8 Apparently spontaneous public gatheringFLASHMOB 8 Social media eventFLASHMOB 8 Using the ToolVisit the instruction to find out more about this tool.