Realises, twigs (7,2)
I believe the answer is:
catches on
(Other definitions for catches on that I've seen before include "Safe way to carry firearms" , "becomes popular" .)
I've seen this clue in The Times.
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.