The phrase "substantial clarification" is correct and usable in written English.
You can use it when you need to describe a thorough explanation of something. For example: "The instructor provided substantial clarification on the assignment in order to ensure everyone understood what was expected."
So the court's reference last week to the "substantial clarification and refinement in the positions of the parties" presents a puzzle.
However, there are methodological issues that would need substantial clarification, re-analysis, and/or additional experimentation for the manuscript to be considered at eLife.
† p <.10 *p <.05 **p <.01 ***p <.001 The results from the second model provide substantial clarification of the role of the criteria for dual use on mortality, especially given the diminished statistical power that accrues from unpacking the generic dual use marker into three specific ones.
He said while the US treasury has offered substantial clarifications, they reveal a number of possible practical complications for EU companies.
"Solana wanted substantial clarifications before conditions could be created for the start of negotiations," the diplomat added.
I really found nothing in here that requires substantial comment or clarification, other than to say it is a thoroughly interesting read - real food for thought.
We made substantial revisions of the text for clarification and added new data.
Finally, general consensus that an average of 80% reduction of symptoms for mild or moderate severity of conditions is a substantial claim, and may require further clarification.
In response to MPs' questions, he has hinted that simply coming up with new legal advice or clarifications wouldn't be substantial enough.
This led to many clarifications, and eventually to a substantial redevelopment of a more precise and restricted version of it over the following decades.
The German chancellor found the evidence substantial enough to call the White House and demand clarification.
