Parisian is carrying shipment -- French delicacy (8)
I believe the answer is:
escargot
'french delicacy' is the definition.
(I've seen this before)
'parisian is carrying shipment' is the wordplay.
'parisian is' becomes 'est' ('is' in French).
'carrying' means one lot of letters goes inside another.
'shipment' becomes 'cargo' (synonyms).
'est' going around 'cargo' is 'ESCARGOT'.
(Other definitions for escargot that I've seen before include "French food" , "One continually moving house" , "slow food?" , "A dish of cooked land snails" , "Edible snail (from Fr.)" .)