Do computers up (4)
I believe the answer is:
scam
'do' is the definition.
(I've seen this before)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for scam that I've seen before include "A slangy swindle or fraud" , "Fraudulent trick or swindle" , "Hoax" , "Confidence trick, swindle" , "fiddle" .)