Large hole in case presented by barrister at the end (6)
I believe the answer is:
crater
'large hole' is the definition.
(I've seen this before)
'case presented by barrister at the end' is the wordplay.
'case' becomes 'crate' (I've seen this before).
'presented by barrister' becomes 'r' (I can't justify this - if you can you should give a lot more credence to this answer).
'at the end' says to put letters next to each other.
'crate'+'r'='CRATER'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for crater that I've seen before include "Volcanic depression" , "Bowl-shaped depression" , "Volcano's mouth" , "Volcanic cavity" , "Great hole as on top of volcano" .)