Is understanding and receptive (4,2)

I believe the answer is:

gets it

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

'is' is the definition.
The definition and answer can be both to do with social activities as well as being verbs in their -s form.
Perhaps they are linked in a way I don't understand?

I don't understand how the remainder of the clue works.

Can you help me to learn more?

I've seen this clue in the Evening Standard.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.