Nick Knowles ultimately accepting 3 contracts (10)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

( INDENT [to notch; to nick] + S [ last letter of {ultimately} KNOWLE S ]) containing (accepting) URE (the URE is a RIVER [entry at 3 down] that flows through Wensleydale in Yorkshire) – Nick Knowles is an English television presenter.