Pretend computer systems issue involves accuracy (10)
I believe the answer is:
exactitude
'accuracy' is the definition.
(I know that exactitude is a type of accuracy)
'pretend computer systems issue involves' is the wordplay.
'pretend' becomes 'act' (I've seen this in other clues).
'computer systems' becomes 'it' (I've seen this in other clues).
'issue' becomes 'exude' (I can't explain this - if you can you should believe this answer much more).
'involves' is an insertion indicator.
'act'+'it'='actit'
'actit' put within 'exude' is 'EXACTITUDE'.
Can you help me to learn more?
(Other definitions for exactitude that I've seen before include "Attention to detail" , "Rigour" , "Precision" .)