IT HAS been a long time since anyone south of the border thought about Kilmarnock Football Club. It has been more than 50 years since they won their only Scottish title and nearly as long since they made their impact on Europe when they reached the last four of the Inter-Cities Fairs’ Cup. But in the first half of the 2018-19 season, Kilmarnock became one of the pacesetters in the Scottish Premiership to remind people that football isn’t all about the Old Firm in Scotland. Much of the “Killie” revolution is down to Steve Clarke, the former Chelsea defender who has been one of English football’s unsung heroes, proving to be an excellent support artist to much more celebrated managerial figures at Chelsea, Newcastle…