Deep void right inside Vance spread (6)
I believe the answer is:
cavern
'deep void' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'right inside vance spread' is the wordplay.
'right' becomes 'r' (common abbreviation).
'inside' is an insertion indicator.
'spread' indicates an anagram.
'vance' is an anagram of 'caven'.
'r' placed into 'caven' is 'CAVERN'.
Can you help me to learn more?
(Other definitions for cavern that I've seen before include "Large underground hollow" , "Detection device" , "Vast dark space" , "Subterranean chamber" , "Large 24 chamber" .)