Right to be entertained by new concerti? Wrong (9)
I believe the answer is:
incorrect
'wrong' is the definition.
(I know that wrong can be written as incorrect)
'right to be entertained by new concerti?' is the wordplay.
'right' becomes 'r' (abbreviation).
'to be entertained by' indicates putting letters inside (inserted letters are hosted or entertained).
'new' indicates anagramming the letters.
'concerti' with letters rearranged gives 'incorect'.
'r' placed inside 'incorect' is 'INCORRECT'.
(Other definitions for incorrect that I've seen before include "Not accurate" , "False, wrong" , "Place of refuge" , "Erroneous" .)