So, THORONDOR, with the musical composition being... a round? Except with the wrong vowel. Maybe it's called a rondo in Italian or something?
This is actually a pretty good clue, if you realise that 'in a spin' applies only to the musical composition; that lets you look for Norse gods at the start of words and back-form from there. Of course, I didn't realise that, which is why I had to wait for the hint.
hS
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