Judicious to limit a computer program's damage (8)
I believe the answer is:
sabotage
'damage' is the definition.
(I have seen 'Deliberate damage ' mean 'sabotage' so perhaps 'damage' could also mean 'sabotage')
'judicious to limit a computer program's' is the wordplay.
'judicious' becomes 'sage' (I've seen this in another clue).
'to limit' means one lot of letters goes inside another (outside letters limit or restrain others).
'computer program' becomes 'bot'.
'a'+'bot'='abot'
'sage' enclosing 'abot' is 'SABOTAGE'.
(Other definitions for sabotage that I've seen before include "Deliberate wrecking" , "Subvert" , "Deliberate act of destruction or disruption" , "Scupper" , "cripple" .)