to have MONEY/TIME TO SPARE
 to still have money/time left after you have spent/used some

EXAMPLES
•Anyone who HAS TIME TO SPARE can join us and help.
•They got to the airport with SECONDS TO SPARE.
•He bought a yacht but he still has SOME MONEY TO SPARE.

QUESTIONS TO ANSWER
•What do you do when you have TIME TO SPARE?
•Who would you help if you had MONEY TO SPARE?
•How often do you get to the airport with SECONDS/MINUTES TO SPARE?