URL ender (3)

I think it could be either:

net

edu

'url ender' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for net that I've seen before include "Open-mesh fabric" , "Catch; fine fabric" , "Open weave fabric" , "Clear profit or gain" , "Open-meshed fabric" .)

I've seen this clue in the LA Times and The New York Times.

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