Hi Manjusha
It does not sound as a true requirement.
When you work in Excel, Word, Outlook, JIRA, notepad, etc.. you do not "enter time" in all those systems separately, you only enter in Clarity. Just because there is an option to "enter time" in one of those, does not mean you have to.
Your true requirement is some sort of output (report, ETL) and you do not need Clarity for given examples.
Based on data granularity level, I suggest as least as possible for a start: project_name, user_name, sum(worklog.timeworked/3600) on monthly basis into WIP
br,
pp