"a clearer expression" is correct and usable in written English.
You can use it when you want to describe something that is expressed in a way that is easier to understand. For example, "My professor offered a clearer expression of the concept."
Nothing could be a clearer expression of the democratic will of the people.
Or the FCC can turn to Congress for a clearer expression of authority.
A clearer expression of good sense and sanity than Utah's would be hard to find.
A beard is a celebration of nature that brings appearance closer to that of untamed human animals — a Rousseau-esque gesture that was crucial to the age of Aquarius, a time when long-established norms of behavior collapsed and made public life a clearer expression of formerly unspeakable private desires.
There could not be a clearer expression of agreement with More in his debate with the Cartesians concerning the substantial presence of the divine within space.
Perhaps nowhere in presocratic philosophy can we find a clearer expression of the character of the Ionian 'intellectual revolution' a decision to put aside an older way of thinking about events grounded in a belief in divine beings in favor of an approach to understanding the world that employs wide-ranging inquiry and direct observation and resorts to strictly physical causes and forces.
Although NAC transcription factor family is quite large, our RNA-Seq data showed that there are only four specific members of NAC family expressed and showed a clear expression pattern during soybean seedlings development (Table 1 and Figure 2).
Control larvae that only express phantom-Gal4 in a wild type background exhibit a clear expression increase of these genes during larval development (Fig. 2).
Both cell lines, CCF-RC1 and CCF-RC2 cells, showed a clear expression of β1 integrins, whereas neither β2 nor β3 integrins were expressed in these renal tumor cells.
"It was a clear expression of the people's will".
"Her look is a clear expression of understated luxury".
