Pony disembowelled by Indian? That’s disturbing (6)
I believe the answer is:
creepy
'disturbing' is the definition.
(I've seen this before)
'pony disembowelled by indian?' is the wordplay.
'disembowelled' says to hollow out the word (remove centre letters).
'by' is a charade indicator (letters next to each other).
'indian?' becomes 'cree' (Cree is an example).
'pony' with its middle removed is 'py'.
'py' after 'cree' is 'CREEPY'.
'that's' acts as a link.
(Other definitions for creepy that I've seen before include "Not wholesome" , "Hair-raising" , "Eerie - chilling" , "Disturbing, crawly" , "Likely to cause goose pimples" .)