Clear screen (3)
I believe the answer is:
net
I believe this clue is a double definition.
'clear' is the first definition.
(as in net profit)
'screen' is the second definition.
(thesaurus)
(Other definitions for net that I've seen before include "Meshed trap" , "What separates court opponents" , "Score a goal" , "Clear profit or gain" , "land" .)