In the outskirts of Surrey, a German wine? (6)
I believe the answer is:
sherry
'wine?' is the definition.
(I know that Sherry is a type of Spanish wine)
'in the outskirts of surrey a german' is the wordplay.
'in the' indicates putting letters inside.
'outskirts of' suggests removing the centre (only letters on the outskirts).
'a german' becomes 'herr' (German equivalent to Mr).
'surrey' with its centre removed is 'sy'.
'sy' going around 'herr' is 'SHERRY'.
(Other definitions for sherry that I've seen before include "Strong sweet wine as aperitif" , "Spanish fortified wine" , "Spanish drink" , "Wine from Spain's Jerez region, drunk as an aperitif" , "Preprandial drink" .)