Wrong to limit ordinary opinion (5)
I believe the answer is:
voice
'opinion' is the definition.
(I've seen this in another clue)
'wrong to limit ordinary' is the wordplay.
'wrong' becomes 'vice' (wrong or sinful behaviour).
'to limit' indicates putting letters inside.
'ordinary' becomes 'O' (abbreviation e.g. O-Levels).
'vice' going around 'o' is 'VOICE'.
(Other definitions for voice that I've seen before include "Stated opinion" , "Wallop" , "Articulation, speech" , "Utter - part" , "Computerised analysis of speech" .)