Epic wanderings of Ulysses (7)
I believe the answer is:
odyssey
'epic wanderings of ulysses' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for odyssey that I've seen before include "Greek epic on the wanderings of Ulysses" , "Book" , "Epic wanderings of 13 across" , "A long adventurous, as told by Homer" , "long tale" .)