Abiding (8)
I believe the answer is:
enduring
'abiding' is the definition.
('endure' can be a synonym of 'abide')
This is all the clue.
(Other definitions for enduring that I've seen before include "showing toleration" , "Long-lasting" , "Bearing patiently or lasting" , "Lasting a very long time, despite hardship (8)" , "having lasting qualities" .)