This read-only gauge is the transmit-side counterpart tracking despool activity on a Clavister interface's Tx ring, recording despool events tied to the ring reaching a completely flooded condition. It signals the outbound queue is being emptied under conditions where it had been entirely full, which points to sustained heavy egress traffic. For example, a rising clvIfTxAvgUse value alongside clvIfTxRingSaturation would indicate the interface's outbound path is under sustained pressure.