Fellow on Irish ship serves soup (5)
I believe the answer is:
ladle
'ship serves soup' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe there's a link between them I don't understand?
'fellow on irish' is the wordplay.
'fellow' becomes 'lad' (synonyms).
'on irish' becomes 'le' (I am not sure about this - if you are sure you should believe this answer much more).
'lad'+'le'='LADLE'
Can you help me to learn more?
(Other definitions for ladle that I've seen before include "Long-handled spoon for serving soup" , "Large deep spoon for serving soup" , "Large spoon with long handle" , "Deep-bowled spoon" , "Spoon - a dell (anag)" .)