Race Comment Explainer

Original comment with matches highlighted:

prominent, hung left 3f out, led over 1f out, readil well final ,

Matched phrases & meanings

Phrase	Meaning
Led over 1f out	The horse took the lead with about one furlong (200m) to go.
Furlong	Unit of distance; one furlong is 1/8 of a mile (approx. 200 meters).
readily	The horse won easily, without having to be pushed to its absolute limit, suggesting it had more to give.
Ran on	The horse maintained or increased its speed in the final stages.

Summary

The horse took the lead with about one furlong (200m) to go.
Unit of distance; one furlong is 1/8 of a mile (approx. 200 meters).
The horse won easily, without having to be pushed to its absolute limit, suggesting it had more to give.
The horse maintained or increased its speed in the final stages.