Kenny Miller has picked Celtic’s Luis Palma as a contender for signing of the season so far in Scotland. The Scottish Premiership is at a halt and will return to action on January 27 with a home tie against Ross County for the Bhoys. But who has been the best signing of the season so far? Well, Kenny Miller certainly thinks Celtic can throw Luis Palma’s name into the hat, even though several other signings haven’t worked out, as he told Clyde 1. Gustaf Lagerbielke was signed in the summer, but it seems as though he could be heading for the exit door already, whilst Maik Nawrocki hasn’t exactly…