have a handle on

Verb

Meaning

(idiomatic) To understand or grasp.
To work efficiently, it's important to have a handle on the procedures involved.

(idiomatic) To be in control of, to have power over.

Source: en.wiktionary.org

Close letter words and terms

have a grip on have a grudge have a hand in have a hankering for have a hard time have a head for