Former Celtic nemesis Scott Brown could be in for a return to Rangers as Ayr United manager in the Scottish Cup. The Gers have drawn an Ibrox clash with the Honest Men in the fifth round of the competition after the completion of the fourth round of Scottish Cup over the weekend. Rangers overcame Dumbarton 4-1 to reach this stage of the competition, with currently managerless Ayr United defeating Kelty Hearts to earn their trip to Ibrox. Now, reports are suggesting that ex-Celtic midfielder Scott Brown is being eyed by the Championship side to take over from Lee Bullen at Somerset Park. Scott …