Fool makes it look easy by not reversing (9)
I believe the answer is:
simpleton
'fool' is the definition.
(I've seen this before)
'easy by not reversing' is the wordplay.
'easy' becomes 'simple' (associated in meaning).
'by' says to put letters next to each other.
'reversing' shows that the letters should be reversed in order.
'not' in reverse letter order is 'ton'.
'simple'+'ton'='SIMPLETON'
'makes it look' acts as a link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for simpleton that I've seen before include "Unintelligent person" , "One very slow" , "Ass" , "Blockhead" , "Ninny" .)