You can set Clockwork to be the time tracking provider in Jira. This is optional, but is required in order to override the Log Work functionality from Atlassian with the Clockwork screens which offer you more flexibility around gathering work log attributes. To set Clockwork as the time tracking provider, log in as a Jira Administrator and go to Jira Settings > Issues > Time tracking. Select Clockwork Automated Timesheets from the Time tracking provider dropdown.
Once this is set up, the following areas will be displaying the Clockwork interface: