Answer: steamertrunk

AnswerCrossword Clue
STEAMERTRUNKStowaway?
STEAMERTRUNKBig clam in the back of the car?
STEAMERTRUNKSailor's luggage piece
STEAMERTRUNKContainer stowed under a berth
STEAMERTRUNKIt's often stowed under a bunk
STEAMERTRUNKRelative of portmanteau.