The most common and most likely answer to this crossword clue is the 7 letter word APOGEES
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The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does APOGEES mean?
APOGEES noun- The point, in an orbit about the Earth, that is furthest from the Earth: the apoapsis of an Earth orbiter.
- (more generally) The point, in an orbit about any planet, that is farthest from the planet: the apoapsis of any satellite.
- (possibly obsolete outside astrology) The point, in any trajectory of an object in space, where it is furthest from the Earth.
- The highest point.