Empties the wide open spaces (5)

I believe the answer is:

voids

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This might be a double definition.

'empties' is the first definition.
('void' can be a synonym of 'empty')

'the wide open spaces' is the second definition.
'voids' can be an answer for 'spaces' (void is a kind of space). I am not certain of the 'the wide open' bit.

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