One's leisure is in the balance (4)
I believe the answer is:
rest
This could be a double definition.
'one's leisure' is the first definition.
'rest' can be an answer for 'leisure' (I've seen this before). I'm not certain of the 'one's' bit.
'the balance' is the second definition.
(I've seen this in another clue)
'is in' acts as a link.
Can you help me to learn more?
(Other definitions for rest that I've seen before include "Take one's ease" , "Motionlessness" , "Others; cease work" , "Lie down" , "still holding it" .)