Spot some sharp implement (6)
I believe the answer is:
pimple
'spot' is the definition.
(I've seen this before)
'some sharp implement' is the wordplay.
'some' says the answer is hidden in the clue (some parts of the word are used).
'PIMPLE' is hidden in the letters of 'sharp implement'.
(Other definitions for pimple that I've seen before include "Small pustule" , "Inflamed skin spot" .)