The Red Planet (4)

I believe the answer is:

mars

'the red planet' is the definition.
('Mars' can be a synonym of 'red planet')

This is the entire clue.

(Other definitions for mars that I've seen before include "RS [RED STAR] (not technically)" , "blights" , "Spoils - heavenly body" , "Famous Texas mission" , "Ruins" .)

I've seen this clue in the USA Today, The Star Tribune, the Newsday and the Newsday.com.

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