Crossword Genius

Volcanic hill implodes, exposing hot stuff (6)

Ross

I believe the answer is:

chilli

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

'hot stuff' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.

'volcanic hill implodes exposing' is the wordplay.
'exposing' says the answer is hidden in the clue (I've seen 'exposes' mean this).
'CHILLI' is hidden in the letters of 'volcanic hill implodes'.

Can you help me to learn more?

(Other definitions for chilli that I've seen before include "Hot one in dish maybe" , "Spicy seed pod" , "Burner" , "Hot capsicum pod" , "Small hot-tasting pod" .)

I've seen this clue in The Hindu.
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