WWE legend Kevin Nash is in the clear ... TMZ has learned -- after cops arrested him in Florida recently for allegedly laying the smackdown on some drunk guy ... for hitting on his wife.
According to the police report, obtained by TMZ, Big Sexy and his lady were leaving a restaurant after dinner, when a man approached Nash's wife and began chatting her up.
According to the report, Nash's wife told the guy to buzz off ... but he got aggressive -- so Nash stepped in and dropped him.
Nash held the man down until police arrived -- but in a cruel twist of fate, he ended up getting arrested himself on suspicion of battery, a charge that was eventually dropped due to lack of evidence.
Nash tells TMZ, he never should have been arrested -- and if he wanted to sue, he'd have a good case in court, adding, "I'm a 52-year-old fake fighter. My hands aren't deadly weapons."