Fate, luck (6)
I believe the answer is:
chance
I believe this clue is a double definition.
'fate' is the first definition.
(thesaurus)
'luck' is the second definition.
(I know that luck can be written as chance)
(Other definitions for chance that I've seen before include "Fortune, hazard" , "Probability" , "Luck -a fine thing?" , "he unpredictable element of life" , "Accidental; opportunity" .)