Sentence:  - The best 2 - year-old pacing mile up to date at Ben White Raceway has been that of Mary Liner ( Mainliner-Highland Ellen ) , a member of the Dick Williams stable , who was <WSD>clocked</WSD> 2 : 25 . 
Meaning of the word marked with <WSD> tags:  measure the time or duration of an event or action or the person who performs an action in a certain period of time