Simple question to get out of rough? (4)
I believe the answer is:
easy
'simple' 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 easy that I've seen before include "Not difficult" , "Men may be told to stand thus" , "Comparable to pie?" , "... Rider (film)" , "Posing no difficulty" .)