Answer:
Breaking a bill : giving a change 
Common clay : Ordinary individual
Trifle : insignificant, little 
Larks : Tricks 
Explanation:
Breaking a bill : A bill could be said to be broken when a smaller bill or denomination is returned to a person usually after having paid for a service or dashing out a part of the larger bill.
Common clay : This phrase takes out the uniqueness or special adornment, as it connotes 'ordinary' or lacking any special features or characteristic. In the context, common clay refers to an ordinary individual.
Trifle : represents which are of little or less importance, value or amount. Things that may be considered as insignificant.