Given a start, also increase in size (5)

I believe the answer is:

swell

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

'increase in size' is the definition.
'swell' can be an answer for 'increase' (I know that swell is a type of increase). I am not certain of the 'in size' bit.

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for swell that I've seen before include "succession of waves" , "'Increase in size, number etc (5)'" , "Heave of the sea's surface" , "Balloon - dandy" , "Enlarge; excellent" .)

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.