I think in any trance state or focus level thougts can appear to have a clear and silent mind is more an ability than a state. Cause if u observe ur thoughts u see u are thinking almost all the time but u can learn to switch that stream of thoughts of. Once u master it u can switch of your thoughts whenever u want. Is it during walking cooking or normal activities or during meditstion or in trance.

I would call it a ability tonget off grid. Cause as far as i jnderstood this thoughts are flying around all the time and we tune into them so to get silent we hqve tonget off gridnof that network.

To become aware of your stream of thoughts is already a good start.