No, if a motorcycle is in neutral, you do not need to hold the clutch when starting it. When the motorcycle is in neutral, the transmission is disengaged, which means the power from the engine is not being transferred to the wheels. In this state, you can start the motorcycle by simply using the electric starter button or kick-starting it, depending on the model.
This is to ensure that the motorcycle does not lurch forward or stall when the engine fires up, as the power can be transmitted to the wheels when the clutch is engaged. By holding the clutch lever, you disengage the transmission, allowing the engine to start without any load on it.
It's always a good practice to consult the owner's manual or follow the manufacturer's recommendations for starting and operating your specific motorcycle model, as different motorcycles may have variations in starting procedures.