Traction Tractor starts moving slow

[DIYMoe]

I have a Farmtrac 45. I only use it to cut grass with a king kutter grooming deck. I had the tractor for over 10 years. Just recently, the tractor, when placing it in gear, moves really slow until it builds up to speed. It does it in forward & reverse. Also after running for an hour or so (or when the tractor heats up), it barely moves when in gear, until it slowly comes up to speed. Possible problem with the clutch?

Thanks.