Is wrong, by the way (3)
I believe the answer is:
sin
This could be a double definition.
'is wrong' is the first definition.
(wrong can mean a sin or crime)
'way' is the second definition.
The definition and answer can be both acts as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'by the' is the link.
Can you help me to learn more?
(Other definitions for sin that I've seen before include "grave offence" , "'Transgression, mortal or venial (3)'" , "Serious offence" , "Serious transgression" , "Pride, say" .)