Point at which the moon is furthest from the Earth (6)
I believe the answer is:
apogee
(Other definitions for apogee that I've seen before include "Orbit's furthest point" , "highly significant point" , "Culmination, climax" , "The point in its orbit where a satellite is at the greatest distance from the Earth" , "Point in the orbit of the moon that's furthest from the earth" .)