Finally finishes plastic surgery with the sharpened tool (6)
I believe the answer is:
scythe
'sharpened tool' is the definition.
'scythe' can be an answer for 'tool' (scythe is a kind of tool). I am not certain of the 'sharpened' bit.
'finally finishes plastic surgery with the' is the wordplay.
'finally' says to take the final letters.
'with' says to put letters next to each other.
The last letters of 'finishes plastic surgery' are 'scy'.
'scy'+'the'='SCYTHE'
Can you help me to learn more?
(Other definitions for scythe that I've seen before include "what the reaper holds" , "Cut down - grass-cutting implement" , "Chesty (anag) -- reaping tool" , "Long-handled cutter" , "Implement for cutting long grass" .)