Making up for wrong article, change pens (7)
I believe the answer is:
penance
'making up for wrong' is the definition.
'article change pens' is the wordplay.
'article' becomes 'an' (indefinite article).
'change' becomes 'pence' (as in small change coins).
'pens' indicates putting letters inside (to pen can mean to contain or imprison).
'an' put into 'pence' is 'PENANCE'.
(Other definitions for penance that I've seen before include "Punishment for religious wrongdoing" , "Expression of sorrow for sin" , "sackcloth and ashes?" , "Punishment for wrongdoing, by religion perhaps" , "Act of contrition" .)