Crossword puzzle clue "mischievous sprite of folklore"

a jolly or boon companion

like an elf, also ELVEN

an unpleasant or mischievous sprite in the form of an old man, also GOBBELINE

a goblin accused of vexing airmen, causing mischief and mechanical trouble to aircraft

to furnish with hobnails

a mischievous fairy; a frightful apparition

to graft feathers onto a bird's wing, also YMPE