Question

he played the part of a grown-up Peter in Hook and the part of a divorced father

he played the part of a grown-up Peter in Hook and the part of a divorced father who disguises himself as an English housekeeper in order to be with his children in Mrs.Doubtfire.

who引导定语从句 修饰father

Answer 1

who disguises himself as an English housekeeper in order to be with his children in Mrs.Doubtfire 是修饰 a divorced father 的定语从句，关系代词指代 the father，相当于 the father disguises himself as an English housekeeper in order to be with his children in Mrs.Doubtfire（该父亲把自己假扮成英国管家，以便在多特菲儿家里与孩子们待在一起） 。
参考译文：他在《胡可》这部剧中扮演了两个角色，一个是成年彼得，一个是离婚的父亲，后者假扮成英国管家，为的是能在多特菲儿家里与孩子们待在一起。

Answer 2

七言古诗石鱼湖上醉歌·并序(元结)