50% more copying farmwork (7)
I believe the answer is:
reaping
'farmwork' is the definition.
I can't judge whether this defines the answer.
'50% more copying' is the wordplay.
'50% more' becomes 're' (I can't explain this - if you can you should give a lot more credence to this answer).
'copying' becomes 'aping' ('ape' can be a synonym of 'copy').
're'+'aping'='REAPING'
Can you help me to learn more?
(Other definitions for reaping that I've seen before include "Harvesting" , "gathering" .)