More bubbly served up for her it seems (8)

I believe the answer is:

frothier

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

'more bubbly' is the definition.
(frothy can mean bubbly)

'up for her it seems' is the wordplay.
'for her it' anagrams to 'FROTHIER'.
However, I'm not sure how the anagram is indicated.

'served' is the link.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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.