Untold (7)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
endless
'untold' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for endless that I've seen before include "Non-stop" , "Havin no limit" , "Constant" , "Everlasting" , "Going on forever, lacking conclusion" .)