Eternal or infinite (7)
I believe the answer is:
endless
I believe this clue is a double definition.
'eternal' is the first definition.
(I've seen this before)
'infinite' is the second definition.
(similar in meaning)
(Other definitions for endless that I've seen before include "Occurring so frequently so as to seem uninterrupted" , "Non-stop" , "Going on forever, lacking conclusion" , "Eternal - unbroken" , "With no limit in sight" .)