Dennis did the wrong thing making a comeback (6)
I believe the answer is:
sinned
'wrong thing making a comeback' is the definition.
I can't tell whether this defines the answer.
'dennis did' is the wordplay.
'did' indicates an anagram (I've seen 'done' mean this).
'dennis' is an anagram of 'SINNED'.
'the' is the link.
Can you help me to learn more?
(Other definitions for sinned that I've seen before include "Transgressed the moral law" , "trespassed" , "Violated a moral law" , "Committed a serious offence" , "Transgressed the moral code" .)