Definitely not a seized turbo. The car would run like a dog and would not sound happy. A TDI should normally have almost no vacuum in the intake. Which hose? Do you have a picture? Is this the hose from the air box to the turbo or the manifold-intercooler piping? Hard plastic hose, accordian like plastic hose, or rubber hose? Is it an aftermarket hose?
Whatever it is it's not a common problem but if you post pics and list all the symptoms (does it otherwise run OK, any smoke, any change in mileage, or it doesn't run at all because of the hose) then it'll be easier to figure it out.