Part of ship finished in stoppage (4-2)
I believe the answer is:
hold-up
'stoppage' is the definition.
(a hold-up is a delay or stoppage)
'part of ship finished' is the wordplay.
'part of ship' becomes 'hold' (area for a ship's cargo).
'finished' becomes 'up' (eg 'time's up' means the time is finished).
'hold'+'up'='HOLD-UP'
'in' is the link.
(Other definitions for hold-up that I've seen before include "Commit armed robbery or keep aloft" , "Support by arms - threaten by arms" , "Stop and rob" , "Robbery; cause of delay" , "Suspend" .)