HClO hybridization?

Yes.

The central atom of HClO is Cl atom, which has 7 valence electrons. 1 valence electron is used to make a Cl-H single bond, 2 valence electron is used to make a Cl=O bond, and 4 valence electrons are left to form 2 lone pairs of electrons. According to VSEPR theory, the arrangement of the 4 electron groups (1 Cl-H single bond, 1Cl=O double bonds and 2 lone pairs of electrons) is tetrahedral as shown in the diagram below.

Only atoms are considered for molecular shape. H-Cl=O shows an angular shape (or V-shape).