What does the indicated attitude of this particular indicator show?

The indicated attitude of the indicator reflects the airplane's movement and orientation relative to the horizon. In this case, a slipping, level turn; 10 degrees to the left suggests that the aircraft is in a steady left turn but is experiencing a slip, meaning that it is not in coordinated flight.

A slipping turn occurs when the aircraft's bank angle is inadequate for the rate of turn being made, causing the aircraft to slide towards the outside of the turn. The indicator showing this condition would be positioned to reflect a left turn, with the specific measurement indicating a 10-degree angle. This situation requires the pilot to manage the coordinated flight by using the ailerons and rudders appropriately to correct the slip and achieve a balanced turn.

Understanding this dynamic is crucial for pilot safety and control, as uncoordinated turns can lead to undesirable flight situations, including loss of control.