Mathematical tool the target of hack? (3)
I believe the answer is:
log
'target of hack?' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps there's an association between them I don't understand?
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for log that I've seen before include "Lump of wood or ship's diary" , "Record book; tree part" , "Ship's record" , "A ship or plane's diary" , "Piece of wood - record" .)