Number in a location for biblical sermon (6)
I believe the answer is:
amount
'number' is the definition.
(I know that number can be written as amount)
'a location for biblical sermon' is the wordplay.
'location for biblical sermon' becomes 'mount' (Jesus' sermon on the mount).
'a'+'mount'='AMOUNT'
'in' acts as a link.
(Other definitions for amount that I've seen before include "Quantity, sum" , "A quantity or total of anything" , "Sum of money" , "Supply" , "value" .)