Places frequently visited — by ghosts? (6)
I believe the answer is:
haunts
'ghosts?' is the definition.
(I know this)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for haunts that I've seen before include "Inhabits as a ghost" , "Visits like a ghost" , "Places where ghosts hang out?" , "Frequently visited places, hangouts" , "Places frequented" .)