Visual about disembowelled raja is prophetic (8)
I believe the answer is:
oracular
'prophetic' is the definition.
(similar in meaning)
'visual about disembowelled raja' is the wordplay.
'visual' becomes 'ocular' (synonyms).
'about' indicates putting letters inside.
'disembowelled' means to remove the middle letters.
'raja' with its middle taken out is 'ra'.
'ocular' enclosing 'ra' is 'ORACULAR'.
'is' acts as a link.
(Other definitions for oracular that I've seen before include "Spoken in the manner of divine announcements" , "How like Sibyl" , "like Mrs Malaprop's tongue" , "claiming authority" , "To do with advice or prophecy as from ancient Greeks" .)