Given direction to add energy rating and short line indicating where wall was knocked through (4,6)
I believe the answer is:
east berlin
'add energy rating and short line indicating where wall was knocked through' is the definition.
I can't tell whether this defines the answer.
'given direction to' is the wordplay.
'given' means one lot of letters go next to another.
'direction' becomes 'east' (compass direction).
'to' becomes 'berlin' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'east'+'berlin' is 'EAST BERLIN'.
Can you help me to learn more?
(Other definitions for east berlin that I've seen before include "Former Communist zone" , "Soviet sector once" , "area once walled off" , "old part of capital" .)