Relieve one of any wrong information by correcting bad issue (8)
I believe the answer is:
disabuse
'relieve one of any wrong information' is the definition.
I can't tell whether this defines the answer.
'correcting bad issue' is the wordplay.
'correcting' indicates anagramming the letters (the order of letters must be corrected).
'bad'+'issue'='badissue'
'badissue' is an anagram of 'DISABUSE'.
'by' acts as a link.
Can you help me to learn more?
(Other definitions for disabuse that I've seen before include "Enlighten" , "Free somebody from an erroneous belief" , "Give correction to" , "Undeceive, set right" , "Rid (one of wrong idea)" .)