Tiny contribution I’d placed in bowl over by clock (6,4)
I believe the answer is:
widows mite
'tiny contribution' is the definition.
(small amount of money in a biblical story)
'i'd placed in bowl over by clock' is the wordplay.
'placed in' indicates putting letters inside (I've seen this in other clues).
'bowl over' becomes 'wow' (bowl over can mean to wow or astonish).
'by' is a charade indicator (letters next to each other).
'clock' becomes 'smite' (both can mean to hit someone).
'id' going inside 'wow' is 'widow'.
'widow'+'smite'='WIDOWS MITE'
(Other definitions for widows mite that I've seen before include "Small contribution" , "Significant contribution" , "small offering" , "Poor contribution" , "Much appreciated though!" .)