Handel's oratorio, first performed in Dublin (7)

I believe the answer is:
messiah
'handel's oratorio first performed in dublin' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for messiah that I've seen before include "Leader, saviour" , "Hallelujah chorus work" , "Redeemer" , "champion, possibly" , "Jesus?" .)