Crossword Genius

Explained how to challenge Labor at education centre (10)

Ross

I believe the answer is:

elaborated

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

'explained how' is the definition.
The definition and answer can be both to do with communicating as well as being past participle verbs.
Maybe they are linked in a way I don't understand?

'challenge labor at education centre' is the wordplay.
'ELABORATED' is hidden within the letters.
But, I am unsure how the hidden word is indicated.

'to' is the link.

Can you help me to learn more?

(Another definition for elaborated that I've seen is " Added detail to (an account)".)

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