Weird and horrible experience involving black vehicle? (7)
I believe the answer is:
macabre
'weird' is the definition.
(I've seen this before)
'horrible experience involving black vehicle?' is the wordplay.
'horrible experience' becomes 'mare' (as in having a mare).
'involving' indicates putting letters inside.
'black vehicle?' becomes 'cab' (black taxicab).
'mare' enclosing 'cab' is 'MACABRE'.
'and' acts as a link.
(Other definitions for macabre that I've seen before include "Brace ma, being gruesome" , "'Sinister, gruesome (7)'" , "Morbidly repellent" , "Ghostly appearance" , "Dark and disturbing" .)