He robs from the ship as well (7)
I believe the answer is:
brigand
'he robs from' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'ship as well' is the wordplay.
'ship' becomes 'brig' (I've seen this before).
'as well' becomes 'and' (I've seen this in other clues).
'brig'+'and'='BRIGAND'
'the' acts as a link.
Can you help me to learn more?
(Other definitions for brigand that I've seen before include "thief" , "Robber in a gang" , "Robber in wild places" , "desperado" , "Bandit" .)