Inclination, propensity (8)
I believe the answer is:
tendency
This clue is a double definition.
'inclination' is the first definition.
(I know that tendency is a type of inclination)
'propensity' is the second definition.
(I know that propensity can be written as tendency)
(Other definitions for tendency that I've seen before include "Penchant, inclination" , "Predisposition" , "'Inclination, disposition (8)'" , "Political group" , "Likelihood - inclination" .)