Room in church -- it's scary, somehow (8)
I believe the answer is:
sacristy
'room in church' is the definition.
(I've seen this before)
'it's scary somehow' is the wordplay.
'somehow' indicates an anagram.
'its'+'scary'='itsscary'
'itsscary' with letters rearranged gives 'SACRISTY'.
(Other definitions for sacristy that I've seen before include "Church's sacred vessels store" , "Room in church for vestments etc." , "Satyr (sic) found in church storage room" , "Part of church" , "Church robing room" .)