Old stone artefact, one displayed in new hotel (6)
I believe the answer is:
eolith
'old stone' is the definition.
(type of ancient stone formation)
'one displayed in new hotel' is the wordplay.
'one' becomes 'i' (Roman numeral).
'displayed in' is an insertion indicator.
'new' indicates an anagram.
'hotel' anagrammed gives 'eolth'.
'i' inserted inside 'eolth' is 'EOLITH'.
'artefact' is the link.
This may not be correct. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for eolith that I've seen before include "Very early stone implement to be found in the oil" , "Elvis Presley song" , "stone tool" , "Old stone implement" , "Flint" .)