Lacking any computing capacity? Hardly! (3,1,3,2,2)
I believe the answer is:
not a bit of it
'lacking any computing capacity?' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.
'hardly' is the wordplay.
I cannot quite see how this works, but
'hardly' could be 'notabit' (I've seen this in another clue) and 'notabit' is found within the answer.
The remaining letters 'ofit' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for not a bit of it that I've seen before include "All or nothing" , "No way!" .)