The Manchester United striker will now remain at St. Andrew’s until at least 1 January, 2014, although Clark admits he would jump at the chance of prolonging it even further.
“I’m absolutely delighted that we’ve been able to extend the deal until at least January,” said the Blues boss.
“We’d like to extend it after that but obviously we’re in the hands of Manchester United.
“We think he’s a sensational young footballer who works extremely hard and he seems to be enjoying his football.
“In and around the training facility he’s got a smile on his face, so it’s good news for us that we’ve got him until then and then we’ll have another look at it.”