Soil or planet (5)
I believe the answer is:
earth
This clue is a double definition.
'soil' is the first definition.
(synonyms)
'planet' is the second definition.
(Earth is an example)
(Other definitions for earth that I've seen before include "Our favourite planet" , "electrical safety precaution" , "Where some creatures live" , "See 12" , "Third rock from the Sun" .)