Our planet (5)

I think it could be either:

earth

terra

'our planet' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for earth that I've seen before include "Soil; ground terminal" , "cost of which is very high" , "Our favourite planet" , "costs so much?" , "hideaway" .)

I've seen this clue in the USA Today, the Sydney Morning Herald, The Mirror, The Sun, The Star Tribune, The Telegraph, the Evening Standard, the Newsday and the Penny Press.

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