There's room for it aboard ship (6)
I believe the answer is:
engine
'ship' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'there's room for it aboard' is the wordplay.
I cannot really understand how this works, but
'there's' could be 'n' (I've seen this in other clues) and 'n' is present in the answer.
'it' could be 'e' ('e' can mean 'electronic' which is similar to 'IT') and 'e' is found in the answer.
'aboard' could be 'in' (I've seen this in other clues) and 'in' is found in the answer.
The remaining letters 'ge' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for engine that I've seen before include "eg Nine (anag.)" , "Machine converting energy into motion" , "Mechanical device as source of power, a driver" , "Locomotive" , "Power unit" .)