What is "vellekla"

Vellekla ( Old Norse "shortage of gold") is a partially preserved drápa composed in the late 10th century by the Icelandic skald Einarr Helgason skálaglamm. It is one of the two drápas he made for Hákon jarl. It speaks of the battle of Hjörungavágr and Hákon's campaign in Denmark, among other things.