Ship ready to be launched possibly in US port (6)
I believe the answer is:
newark
'us port' is the definition.
(I've seen this before)
'ship ready to be launched possibly' is the wordplay.
I cannot really understand how this works, but
'ship' could be 'ark' (I've seen this in other clues) and 'ark' is found within the answer.
The remaining letters 'new' is a valid word which might be clued in a way I don't understand.
This may be the basis of clue (or it may be nonsense).
'in' acts as a link.
Can you help me to learn more?
(Other definitions for newark that I've seen before include "US port" , "Nottinghamshire town" , "east coast port" , "US gateway" , "Notts. town; NJ city" .)