Definition: "more than enough"

This is an anagram - look for an indicator word that suggests mixing or rearranging letters from other words in the clue.

The word 'forms' is your anagram indicator - it signals that you need to rearrange the letters from 'Fill up ten' to create a new word.

Answer: PLENTIFUL | 'Forms' indicates anagram - rearrange the letters of 'Fill up ten' to get PLENTIFUL (more than enough)