Open secret, key for computer is not in the office of bank (4,4)
I believe the answer is:
salt away
'bank' is the definition.
(thesaurus)
'open secret key for computer is not in' is the wordplay.
'open secret key for computer' becomes 'salt' (I can't explain this - if you can you should believe this answer much more).
'is not in' becomes 'away' (I've seen this before).
'salt'+'away'='SALT AWAY'
'the office of' acts as a link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for salt away that I've seen before include "Put aside" , "principle of low-sodium diet?" , "Store" , "Save" , "set aside" .)