Race Comment Explainer

Original comment with matches highlighted:

midfield, headway 3 out, led going well 2 out, ridden before last, flat,

Matched phrases & meanings

Phrase	Meaning
ridden before	The jockey started urging the horse aggressively before the second-last obstacle to try and get it back into contention.
Headway	The horse was moving up through the field.
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 jockey started urging the horse aggressively before the second-last obstacle to try and get it back into contention.
The horse was moving up through the field.
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.