have the makings of something Definition

making
noun

1. The act or process of producing or forming the specified thing.

Example: breadmaking
Example: music-making
2a. The materials or qualities from which something can be made;

Form: makings
2b. colloq
The things needed to roll a joint, eg tobacco, cigarette papers, hash, matches, etc;
Form: makings
2c. colloq
The things needed to prepare a fix (sense 2b) of heroin, etc.
Form: makings

Idiom: be the making of someone

To ensure their success. Opposite of be the undoing of someone under undoing.
Example: This marriage will be the making of him

Idiom: have the makings of something

To have the ability to become, or to show signs of becoming, a specified thing.
Example: has the makings of a fine doctor

Idiom: in the making

In the process of being made, formed or developed.
Example: She is a star in the making

Idiom: of one's own making

Brought about by one's own actions.