Heartbreak in space (5)
I believe the answer is:
earth
This could be a double definition.
'heartbreak in' is the first definition.
The answer and definition can be both substances as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'space' is the second definition.
The answer and definition can be both locations as well as being singular nouns.
Maybe you can see an association between them that I don't see?
Can you help me to learn more?
(Other definitions for earth that I've seen before include "Soil; ground terminal" , "Make electrics safe" , "our present abode" , "Heart (anag)" , "It is necessary to clear" .)