The scientist said it very clearly

[GoodTaste]

(Background: A plan to build a sufficiently advanced accelerator)

The scientist said it very clearly:"There is no current human technology that can build an accelerator like that. Besides, the spending will be forbiddingly high."

("It" intends to mean "the plan".)
============================

Is "said it very clearly" proper in English? Should it be "said about it very clearly"? Or should it simply be "said very clearly"?

 

[Tarheel]

The scientist expressed the thought in a manner that made it easy to understand.

 

[GoodTaste]

Could we make it shorter?
PS. You haven't answered my question. (you just offered your version)

 

[tzfujimino]

(Background: A plan to build a sufficiently advanced accelerator)

The scientist said it very clearly:"There is no current human technology that can build an accelerator like that. Besides, the spending will be forbiddingly high."

("It" intends to mean "the plan".)
============================

Is "said it very clearly" proper in English?
Yes.
Should it be "said about it very clearly"?
No.

Also, the "it" refers to the following "There is no current human technology that can build an accelerator like that. Besides, the spending will be forbiddingly high."

 

[Tarheel]

Could we make it shorter?
PS. You haven't answered my question. (you just offered your version)

No, I didn't. I gave you an explanation of the sentence in bold print (which you seem to have trouble understanding).

Why would it not be proper English?