I dial ‘translate’ to get a Greek epic poem (5)
I believe the answer is:
iliad
'a greek epic poem' is the definition.
(I've seen this in another clue)
'i dial translate' is the wordplay.
'translate' indicates an anagram.
'dial' is an anagram of 'liad'.
'i'+'liad'='ILIAD'
'to get' is the link.
(Other definitions for iliad that I've seen before include "Greek epic poem about the Trojan War" , "The -----, Homeric epic" , "ancient tale" , "Homer's tale" , "No short tale" .)