Catch on to and Clear up

Catch on to verb - To come to an awareness of.

Clear up and catch on to are semantically related. in understand topic. In some cases you can use "Clear up" instead a verb "Catch on to".

Clear up verb - To make plain or understandable.

Catch on to and clear up are semantically related. Sometimes you can use "Catch on to" instead a verb "Clear up".