Net empty (5)

I believe the answer is:

clear

This clue is a double definition.

'net' is the first definition.
(I know that net can be written as clear)

'empty' is the second definition.
(I've seen this before)

(Other definitions for clear that I've seen before include "Unobstructed" , "Not obstructed" , "Lucid; to empty" , "Distinct - obvious" , "Patent" .)

I've seen this clue in The Telegraph.

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