Conscious ship’s left this behind (5)
I believe the answer is:
awake
'conscious' is the definition.
(similar in meaning)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for awake that I've seen before include "No longer in the land of Nod" , "Cease sleeping" , "Completely conscious" , "Come to" , "Patriotic song 'The West's .....'" .)