Sculpted idol found in tomb -- curious enigma (6,5)
I believe the answer is:
graven image
'sculpted idol' is the definition.
(I've seen this before)
'in tomb curious enigma' is the wordplay.
'in' is an insertion indicator.
'tomb' becomes 'grave' ('grave' can be a synonym of 'tomb').
'curious' is an anagram indicator.
'enigma' with letters rearranged gives 'enimag'.
'grave' enclosing 'enimag' is 'GRAVEN IMAGE'.
'found' is the link.
(Other definitions for graven image that I've seen before include "Glorified carving" , "Sculpted idol" , "Revered figure" , "Idolised figure" .)