Large increase (7)
I believe the answer is:
upswell
(Other definitions for upswell that I've seen before include "Sudden increase" , "Increase, surge" , "Increase, upsurge" , "Movement to higher level" .)
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.