OP:
That’s not clipping!
Clipping is a type of distortion heard when an amplifier reaches the maximum voltage swing it is capable of. It’s called clipping because the normally sinusoidal like signals do a hard stop at the maximum voltage, looking as if scissors had clipped them. It sounds quite harsh. It does not sound like silence.
The audio cutting out is not clipping. It’s more likely a sign of a thermal or current overload. It may happen if your speakers have too low of an impedance for your amp, whether by design or fault.