John Hartson isn’t convinced “clumsy” Celtic hero Daizen Maeda has the credentials to cut it in the Premier League. The Hoops attacker has started the season well with six goals and two assists from the opening nine fixtures of the season and has had fans purring at his performances. A routine criticism of the Japanese hitman, 26, has been his lack of cutting edge in the final third and former striker Hartson reckons that profligacy is one reason he’s not ready to cut it down south. READ MORE: John Hartson says ‘fantastic’ Celtic hero has been playing better than Nicolas Kuhn this seasonStill,…