Permanent shoemaker's model in the capital of Germany (7)
I believe the answer is:
'permanent' is the definition.
(I know that permanent can be written as lasting)
'shoemaker's model in the capital of germany' is the wordplay.
'shoemaker's model' becomes 'last' (I've seen this in another clue).
'the capital of' says to take the initial letters.
The initial letter of 'germany' is 'g'.
(Other definitions for lasting that I've seen before include "long-term" , "Permanent" , "Long-lived" , "Enduring" , "Abiding, durable" .)