Sign from second corporation to land on moon? (7)

I believe the answer is:

scorpio

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But I can't explain it at all! Could you help me understand?

(Other definitions for scorpio that I've seen before include "Eighth sign of the Zodiac, kind of spider" , "Oct-Nov zodiac sign" , "Sign of stinging arachnid" , "Star sign" , "Stinger" .)

I've seen this clue in The Telegraph.

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