Stay in central Crimea in the same place (6)
I believe the answer is:
ibidem
'in the same place' is the definition.
(synonyms)
'stay in central crimea' is the wordplay.
'stay' becomes 'bide' (biding is a kind of staying).
'in' means one lot of letters goes inside another.
'central' indicates the central letters.
The central letters of 'crimea' are 'im'.
'bide' placed within 'im' is 'IBIDEM'.
(Other definitions for ibidem that I've seen before include "Latin word indicating in same book or passage" , "In the same place (in references)" , "In the same place as previous reference" , "In the same source (Lat.)" , "In reference notes, denotes in the same place" .)