Attic in which old lady hides gems from the east (7)
I believe the answer is:
grecian
'attic' is the definition.
(I've seen this before)
'old lady hides gems from the east' is the wordplay.
'old lady' becomes 'gran' (I've seen this in other clues).
'hides' means one lot of letters goes inside another.
'gems from the east' becomes 'eci' (I am not sure about this - if you are sure you should believe this answer much more).
'gran' enclosing 'eci' is 'GRECIAN'.
'in which' is the link.
Can you help me to learn more?
(Other definitions for grecian that I've seen before include "Relating to ancient Greece" , "Classically simple - in grace (anag)" , "Hellene" , "classical style" , "Attic" .)