prolonged (8)
I believe the answer is:
extended
'prolonged' is the definition.
(I know that prolonged can be written as extended)
This is all the clue.
(Other definitions for extended that I've seen before include "Reached out for next deed" , "Stretched or prolonged" , "Protracted, elongated" , "Stretched out over a distance" , "Stretched out over time or space" .)