Specify is the best I can think of, but it doesn’t by itself capture the change from ambiguity to less ambiguity.
For example, does this make sense grammatically? Assume I can’t remove the words, his statement.:
"That ship cost me"I spent my entire net worth to ride a ship", said Blake.
"Since when did boats become so expensive?" He later
Blake realized that he had been misunderstood, so he specified his statement:. "It wasn't a boat. It It was a rocketship that I paid exorbitant amounts of money to ride ride."
I’ve tried searching for synonyms of specify and clarify, but none of them does the trick.
A compound word or phrase would be acceptable.
EDIT: Add original statement: "That ship cost me my entire net worth to ride."