Race Comment Explainer

Original comment with matches highlighted:

towards rear of mid-division on inside, 3 out, well beaten next,

Matched phrases & meanings

Phrase	Meaning
Mid-division	Running in the middle of the pack.
Towards rear	Running near the back of the field.
not fluent	The horse jumped the tenth fence/hurdle poorly or awkwardly
tailed off	A definitive statement that the horse was finished and effectively out of the race

Summary

Running in the middle of the pack.
Running near the back of the field.
The horse jumped the tenth fence/hurdle poorly or awkwardly
A definitive statement that the horse was finished and effectively out of the race