Wrong note, right singer (5)
I believe the answer is:
tenor
'singer' is the definition.
(tenor is a kind of singer)
'wrong note right' is the wordplay.
'wrong' is an anagram indicator.
'right' becomes 'r' (common abbreviation**).
'note' anagrammed gives 'teno'.
'teno'+'r'='TENOR'
(Other definitions for tenor that I've seen before include "Male singing voice of high pitch" , "General course - male singer" , "Meaning - male singing voice" , "Eg, Caruso" , "character" .)