Saving claim one prepared about small company (10)
I believe the answer is:
Here is my best explanation:
'saving' is the definition.
'claim one prepared about small company' is the subsidiary indication.
'prepared' indicates an anagram.
'about' indicates putting letters inside.
'small company' becomes 'co'.
'claimone' with letters rearranged gives 'enomical'.
'enomical' going around 'co' is 'economical'.
(Other definitions for economical that I've seen before include "Frugal", "Providing good value", "Giving good value for money", "Money-saving" and "Thrifty".)