But he told BBC Radio 4's Today programme: "The detail of exactly how you make those principles work in practice are, of course, things that we want to get right. And I couldn't agree more with Norman, we have to get this right.
"The NHS is too precious not to get the principle translated properly into practice."
Mr Clegg added there was "no point" in the pause - to get health professionals behind the reforms - unless the Government was prepared to make "substantive changes".