Poem about end of journey on ship taking years (7)
I believe the answer is:
odyssey
'poem' is the definition.
(Odyssey is an example)
'end of journey on ship taking years' is the wordplay.
'end of journey' becomes 'odey' (I can't justify this - if you can you should believe this answer much more).
'on' indicates putting letters inside (as in clothing 'on' a person).
'ship' becomes 'SS' (prefix in ship names eg SS Great Britain).
'taking' is an insertion indicator.
'years' becomes 'y' (abbreviation).
'odey' placed around 'ss' is 'odssey'.
'odssey' enclosing 'y' is 'ODYSSEY'.
'about' acts as a link.
Can you help me to learn more?
(Other definitions for odyssey that I've seen before include "Greek epic on the wanderings of Ulysses" , "Long, eventful, wandering journey" , "Gruelling journey as by Homer" , "'Long eventful journey, such as that of Ulysses (7)'" , "A long arduous journey as described by Homer" .)