Maria confused in current Semitic language (7)
I believe the answer is:
aramaic
'semitic language' is the definition.
(I've seen this before)
'maria confused in current' is the wordplay.
'confused' indicates an anagram.
'in' is an insertion indicator.
'current' becomes 'ac' (alternating current).
'maria' with letters rearranged gives 'ramai'.
'ramai' placed into 'ac' is 'ARAMAIC'.
(Other definitions for aramaic that I've seen before include "Semitic language spoken in New Testament times" , "Near Eastern language" , "Language of Christ" , "Language of Near East" , "Ancient Semitic language" .)