Sometimes the Torah uses the word בגד for clothing, for example Vayikra 11:32, and sometimes it uses מלבוש, for example Iyov 27:16, or לבוש, as in Ester 6:8. This answer discusses the difference between the two.
The verb is always constructed from the latter (לבוש), even when the noun is the former (בגד), for example Vayikra 16:23 - וּבָא אַהֲרֹן אֶל-אֹהֶל מוֹעֵד וּפָשַׁט אֶת-בִּגְדֵי הַבָּד אֲשֶׁר לָבַשׁ בְּבֹאוֹ אֶל-הַקֹּדֶשׁ..
Why is the word for normal wearing constructed from the word for non-normal clothing? And why does the word בגד not have a verb form which refers to clothing?