Unkempt guy, from the Yiddish Crossword Clue

 The Yiddish word for unkempt guy is schlub. It is a noun that refers to a man who is untidy and unshaven. Schlubs are often seen as lazy and unkempt.

The word schlub is derived from the Yiddish word shlepen, which means to drag or haul. This suggests that schlubs are seen as people who are dragging themselves through life without any energy or ambition.

The word schlub is often used in a derogatory way, but it can also be used in a more affectionate way to describe a man who is seen as being lovable and cuddly.

In a crossword puzzle, the clue "Unkempt guy, from the Yiddish" would most likely refer to the word schlub.