Nottingham Forest have completed the signing of Wolves midfielder Sammy Clingan for a nominal fee.
Clingan has been in fine form for Chesterfield this season
The 22-year-old has spent most of the season on loan at Forest's League One rivals Chesterfield.
Clingan, a Northern Ireland Under-21 international, agreed to a two-and-a-half year contract and will make his debut against Barnsley.
He is the third player to arrive at Forest during the transfer window, after Julian Bennett and Grant Holt.