Wine being smuggled aboard ship in jars (6)
I believe the answer is:
shocks
'jars' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for shocks that I've seen before include "Sudden upsetting or surprising events" , "Appals" , "Effects of charges of electricity" , "'Stuns, jolts (6)'" , "Surprises, sometimes electrical" .)