Dope easy to name (9)
I believe the answer is:
simpleton
'dope' is the definition.
(I've seen this before)
'easy to name' is the wordplay.
'easy' becomes 'simple' ('simple' can be similar in meaning to 'easy').
'name' becomes 'n' (common abbreviation e.g. on forms).
'simple'+'to'+'n'='SIMPLETON'
(Other definitions for simpleton that I've seen before include "Dunce" , "Ass" , "Simon for one" , "Naive person" , "Idiot" .)