Crossword Genius

It's very small and in favour of putting on weight (6)

Ross

I believe the answer is:

proton

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

'it's very small' is the definition.
I can't judge whether this definition defines the answer.

'in favour of putting on weight' is the wordplay.
'in favour of' becomes 'pro' (being pro a particular cause).
'putting on' says to put letters next to each other.
'weight' becomes 'ton' (unit of weight).
'pro'+'ton'='PROTON'

'and' is the link.

Can you help me to learn more?

(Other definitions for proton that I've seen before include "just a little bit" , "One's charged" , "Particle in atom nucleus" , "Positively charged particle" , "Positive-charged particle" .)

I've seen this clue in The Globe and Mail.
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.