Sharp enough to cut a key (4)
I believe the answer is:
cute
'sharp' is the definition.
(I've seen this in another clue)
'cut a key' is the wordplay.
'a key' becomes 'e' (I've seen this in other clues).
'cut'+'e'='CUTE'
'enough to' acts as a link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for cute that I've seen before include "winning" , "Charming, quaint" , "Attractive or ingenious" , "Sweet, attractive" , "Daintily pretty" .)