No end of time (8)
I believe the answer is:
'time' is the definition.
(I know that eternity is a type of time)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for eternity that I've seen before include "Endless period" , "Forever and ever" , "Perpetuity" , "Time without end" , "World without end" .)