He treated them to supplies totally well prepared (5,2,3,5)

I believe the answer is:

armed to the teeth

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

'totally well prepared' is the definition.
'armed to the teeth' can be an answer for 'prepared'. I am not sure about the 'totally well' bit.

'he treated them to supplies' is the wordplay.
'supplies' indicates anagramming the letters (I've seen 'supply' mean this (in a supple way)).
'he'+'treated'+'them'+'to'='hetreatedthemto'
'hetreatedthemto' is an anagram of 'ARMED TO THE TEETH'.

Can you help me to learn more?

(Another definition for armed to the teeth that I've seen is " with lots of weapons".)

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.