Black key -- where E is found? (4)
I believe the answer is:
inky
'black' is the definition.
(similar in meaning)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for inky that I've seen before include "Completely dark" , "Dark; stained" , "Pitch-black" , "Like writing fluid" , "Black as pen fluid?" .)