German wine from second retailer runs out (7)
I believe the answer is:
moselle
'german wine' is the definition.
'from second retailer runs out' is the wordplay.
'from second' becomes 'mo' (I can't explain this - if you can you should give a lot more credence to this answer).
'retailer' becomes 'seller' (I've seen this in another clue).
'runs' becomes 'r' (cricket abbreviation).
'out' suggests deleting specific letters.
'seller' with 'r' taken away is 'selle'.
'mo'+'selle'='MOSELLE'
Can you help me to learn more?
(Other definitions for moselle that I've seen before include "French or German white wine" , "Light white wine" , "River; white wine" , "French department" , "Fr. river, department; German wine" .)