Elvish folk spin in places (7)
I believe the answer is:
sprites
'elvish folk' is the definition.
(elf-like creatures)
'spin in places' is the wordplay.
'spin' becomes 'pr' (short for public relations - media spin).
'in' indicates putting letters inside.
'places' becomes 'sites' (site is a kind of place).
'pr' inserted within 'sites' is 'SPRITES'.
(Other definitions for sprites that I've seen before include "Brownies" , "goblins?" , "Elves or fairies" .)