Litre in wine store I needed for this: it usually goes with caviar (5)
I believe the answer is:
blini
'for this it usually goes with caviar' is the definition.
(blini might be served with caviar)
'litre in wine store i' is the wordplay.
'litre' becomes 'L' (abbreviation).
'in' means one lot of letters goes inside another.
'wine store' becomes 'bin' (stand for storing wine bottles).
'l' inserted inside 'bin' is 'blin'.
'blin'+'i'='BLINI'
'needed' acts as a link.
(Other definitions for blini that I've seen before include "Eastern European twenty four Ac" , "East European pancakes" , "Buckwheat pancakes" , "Pancakes served with sour cream" , "Russian food" .)