Bits in random access for computer (3)
I believe the answer is:
mac
'for computer' is the definition.
(as in an Apple Mac)
'bits in random access' is the wordplay.
'bits' says the answer is hidden in the clue (I've seen 'bit of' mean this).
'MAC' can be found hidden inside 'in random access'.
(Other definitions for mac that I've seen before include "laptop?" , "A Gaelic son, often in name" , "It may help you keep dry" , "Waterproof raincoat, in short" , "Coat - computer" .)