Get together for a private conference (6)
I believe the answer is:
huddle
'conference' is the definition.
(huddle is a kind of conference)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for huddle that I've seen before include "Crowd together in small space" , "Nestle or crowd together" , "Get together (to confer)" , "Powwow" , "Draw together" .)