Ancient warship (6)
'ancient warship' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for bireme that I've seen before include "Rowed boat long ago" , "Ancient vessel" , "Old craft with two banks of oars" , "old vessel?" , "with two tiers" .)
'ancient warship' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for trireme that I've seen before include "Greek warship" , "Galley with three banks of oars" , "Long rowing boat" , "Ancient galley with three tiers of oars on each side" , "Ancient warship with three banks of oars" .)