Wolfsburg manager Steve McClaren is also reported to be interested in the United States international.
However, Hughes has promised a blunt response if any enquiries are made.
"I'm sure there is interest in Clint. Most good players are mentioned at some point in time leading into a window," said the Fulham boss.
"There's been no contact from any clubs for Clint or any other player.
"Nor would we encourage it because Clint's very happy here, is enjoying his football and is having an impact for us.
"If there any enquires about Clint, they'll be getting short shrift."