Tip of little finger sliced off, black (4)
I believe the answer is:
inky
'black' is the definition.
(similar in meaning)
I can't explain the rest of the clue.
(Other definitions for inky that I've seen before include "Marked by leaky pen" , "Leaked on by pen" , "Black; drunk (Aus. sl.)" , "Like writing fluid" , "Like the printing trade" .)