"If somebody comes in through the front door and makes an official inquiry or bid, we will have to react to it. But we are not in a situation where we have to do anything, which is lovely."
When asked about the £6 million figure reported on Wednesday, Clough laughed and then said: "Nobody knows what we want or what the fee is going to be because we have not got a specific valuation in mind.
"Would it be more than £6 million? Yes, I think it is fair to say that. We just think it is going to be a very, very substantial figure to tempt him away."
Hughes has long been regarded as one of the brightest emerging talents in English football. He made his Championship debut for Derby at the age of 16 and was a regular in the side last season, making 38 appearances, including 36 starts. He would have played more games but for a groin injury that kept him out for two months.
The teenager has started the Rams' three league matches this season and played for England Under-21s against Scotland last week and impressed once again.
(Edited by Evan Fanning)