Bowl right beside case (6)
I believe the answer is:
crater
'bowl' is the definition.
(thesaurus)
'right beside case' is the wordplay.
'right' becomes 'r' (common abbreviation).
'beside' says to put letters next to each other (I've seen this in other clues).
'case' becomes 'crate' (both can mean a container).
'r' put after 'crate' is 'CRATER'.
(Other definitions for crater that I've seen before include "Great hole as on top of volcano" , "Fissure in the earth's crust" , "Bowl-shaped opening" , "Hole left by bomb" , "Bowl-shaped depression" .)