Race Comment Explainer

Original comment with matches highlighted:

held up towards rear, held over 1f out, every chance well inside final ,

Matched phrases & meanings

Phrase	Meaning
Towards rear	Running near the back of the field.
just held	The horse's powerful late run was not quite enough, and it lost the race by the narrowest possible margin (e.g., a nose or short head).
Held up	Intentionally raced patiently at the back to save energy.
Furlong	Unit of distance; one furlong is 1/8 of a mile (approx. 200 meters).
Headway	The horse was moving up through the field.

Summary

Running near the back of the field.
The horse's powerful late run was not quite enough, and it lost the race by the narrowest possible margin (e.g., a nose or short head).
Intentionally raced patiently at the back to save energy.
Unit of distance; one furlong is 1/8 of a mile (approx. 200 meters).
The horse was moving up through the field.