Counter with inlaid nacre embellished sanctuary (10)
I believe the answer is:
tabernacle
'sanctuary' is the definition.
(I've seen this before)
'counter with inlaid nacre embellished' is the wordplay.
I cannot quite see how this works, but
an anagram of 'nacre' is 'ernac' which is located in the answer.
'counter' could be 'table' (I've seen this before) and 'table' is located in the leftover letters.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for tabernacle that I've seen before include "Mormon temple" , "sanctuary" , "Mormon place of worship" , "Nonconformist church" , "Mormon meeting-place" .)