I had never come across the “cover” description outside of pop music, until the early 90s. I recall being rather miffed when the MC of a community concert in which my folk (a cappella harmony) trio were about to perform, said :
“Oh. You just do covers then - no originals?”
I realised later that night that we were the only performers on the bill who hadn’t written their own CRAP …. er, sorry, “their own music”.
If those hallowed “originals” were the standard to live down to, I thought, give me our interpretations of both Traditional and quality Contemporary compositions any day!

:) :) :)
R-J