Subtracting zeros, we love to crunch number (6)
I believe the answer is:
twelve
'number' is the definition.
(I know that twelve is a type of large integer)
'subtracting zeros we love to crunch' is the wordplay.
I cannot really see how this works, but
'we' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for twelve that I've seen before include "Six twos" , "Basis of duodecimal system" , "Last hour" , "houses in a year?" , "Highest number on clock" .)