Crossword Genius

Understanding it's becoming entangled with (8,2)

Ross

I believe the answer is:

catching on

I'm a little stuck... Click here to teach me more about this clue!

'understanding' is the definition.
The answer and definition can be both related to thinking as well as being present participle verbs.
Maybe they are linked in a way I don't understand?

I don't understand the remainder of the clue.

Can you help me to learn more?

(Another definition for catching on that I've seen is " Becoming popular".)

I've seen this clue in the Evening Standard.
Want a hint initially instead of a full solution? Install my app