| Answer | Crossword Clue |
|---|---|
| conferencing | Take part in a conference or conference call |
| challenges | A call to take part in a contest or competition, esp. a duel |
| challenge | A call to take part in a contest or competition, esp. a duel |
| summit | to take part in a summit conference |
| summited | SUMMIT, to take part in a summit conference |
| summiting | SUMMIT, to take part in a summit conference |
