To dress oneself upon the subject
In the question: Begin to address the issue in a fundamental and objective manner.
(Modern Hebrew)
Translation
Expression (Hebrew)
הִתְלַבֵּשׁ עַל הַנּוֹשֵׂא
Definition (Hebrew)
בְּהַשְׁאָלָה: הֵחֵל לְטַפֵּל בָּעִנְיָן בְּצוּרָה יְסוֹדִית וְעִנְיָנִית.
(הָעִבְרִית הַחֲדָשָׁה)