Goddess lives again (4)
I believe the answer is:
isis
'goddess' is the definition.
(Egyptian god)
'lives again' is the wordplay.
'lives' becomes 'is' ('be' can be a synonym of 'live').
'again' becomes 'is' (I can't explain this - if you can you should believe this answer much more).
'is'+'is'='ISIS'
Can you help me to learn more?
(Other definitions for isis that I've seen before include "Old Egyptian fertility goddess" , "A dark blue flower" , "academic stream?" , "Sister of Osiris" , "where one might take a punt" .)