The point at which current motivation is available
I believe the answer is:
power
'the point' is the definition.
(synonyms)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for power that I've seen before include "Strength, force" , "Exponent" , "Ability to act or physical might" , "Force - potentiality" , "Control and influence exercised over others" .)