Crossword Genius

Moon best seen orbiting second of planets by day (9)

Ross

I believe the answer is:

satellite

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'moon' is the definition.
(thesaurus)

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(Other definitions for satellite that I've seen before include "outpost" , "Space traveller" , "Subordinate" , "Moon" , "Celestial body orbiting around another" .)

I've seen this clue in The Telegraph.
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