Is there a Park and Share beside the A24 at Clough?

Yes.

The official list places Clough Park and Share at the A24 Newcastle Road / Clough Road roundabout. It is a meeting point for drivers, not a train station or guaranteed bus interchange. It can help people travelling between the Belfast side and Newcastle area share one car for part of the trip. Drive into the actual marked facility rather than waiting on the roundabout approach, and agree the exact entrance with your passengers.