That's the one! You just needed to 'wind' elms a bit around boor and put boor amongst the elms a bit.
I understand the frustration, Huey ... I have felt totally stumped by a lot of your clues, which then seemed quite logical once the answers were revealed.
I often don't instantly spot combinations. I sometimes write them out and play with the letters a bit, crossing them out as I use them.
BROMOSEL: He’s a rough and churlish fellow, but amongst winding trees we see him more clearly.
ORLON: He’s Wellsian, but less sibilant. More direction.
GODDAM: Demented canine in retreat: see him!
GIMLET: Keen-sighted hero, or just a comic character? Or perhaps a cocktail of both?
ISINGLASS: Coming up without direction, a girl joins here.
EORACHE: A competition to see who can plough fastest? She’s a bit messed up.
SPAM: He reads maps backwards.
THEME: 'BORED OF THE RINGS.'
Huinesoron, it's over to you again!
