Take Jerusalem and cut the whole damn
rebellion off at its head. Nice and clean.
what does "Nice and clean" mean here?
thx in advance.
This is surely an informal usage. Clean (adverb) means completely here. The filler nice and adds nothing to the meaning.
I assume this comes from either an old movie or book about a crusade or other invasion of Jerusalem. Some general might have been told to attack and conquer Jerusalem, do it quickly and without much opposition.
In a cops and robbers/gang type movie, for example, someone may be told to kill someone and not to leave any evidence behind........... they would be told to "get rid of the body, nice and clean."