Sky Sports reporter Keith Downie has named the price West Ham will sign Jack Clarke for from Sunderland in the January window. West Ham are desperately seeking additions in the January transfer window and that could be bad news for Sunderland. David Moyes’ need for a new forward has become more acute in the last week to say the least. And it has coincided with increasing links to Sunderland’s star player Jack Clarke. ‘New Grealish’ a Hammers targetThe Hammers were looking for an attacker before a glut of injuries to key players. With Michail Antonio out for another six weeks, Mohammed Kudus aw…