Worthiness, value (5)
I believe the answer is:
merit
I believe this is a double definition.
'worthiness' is the first definition.
(merit is a kind of worthiness)
'value' is the second definition.
(I've seen this in another clue)
(Other definitions for merit that I've seen before include "Earn" , "distinction" , "Advantage" , "Have a right" , "The M in OM" .)