Answer: summitmeeting

AnswerCrossword Clue
SUMMITMEETING

Get-together for world leaders

SUMMITMEETING

Top-level conference

SUMMITMEETING

... for an acrophobic wallflower?

SUMMITMEETING
Conference for big shots
SUMMITMEETING
Heads-of-state conference
SUMMITMEETINGPresidential diplomacy
SUMMITMEETINGHeads of state get-together
SUMMITMEETINGWhere heads may come together
SUMMITMEETINGGathering of heads of state