Spine-tingling (5)
I believe the answer is:
eerie
'spine-tingling' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for eerie that I've seen before include "Uncannily strange" , "Ghostly" , "Weird and disturbing" , "Strangely frightening" , "Spooky, creepy" .)