Place to get a Reuben (4)
I believe the answer is:
deli
'place to get a reuben' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for deli that I've seen before include "Specialist food shop" , "Special shop" , "place to buy food" , "Seller of unusual foods" , "Specialist foodshop(abbr.)" .)