Current parliament returns early work (5)
I believe the answer is:
iliad
'early work' is the definition.
(ancient literary work)
'current parliament returns' is the wordplay.
'current' becomes 'i' (symbol for electric current).
'parliament' becomes 'dail' (I've seen this before).
'returns' shows that the letters should be reversed in order.
'dail' written backwards gives 'liad'.
'i'+'liad'='ILIAD'
(Other definitions for iliad that I've seen before include "A work by 7" , "LITERATURE" , "literary work" , "Greek epic poem describing the siege of Troy" , "Homer's epic poem on the siege of Troy" .)