Crossword Genius

This volcano puts out when hot (3)

Ross

I believe the answer is:

ash

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

'this volcano puts out' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.

'when hot' is the wordplay.
'when' becomes 'as' (eg 'when I walked' means 'as I walked').
'hot' becomes 'h' (abbreviation eg on taps).
'as'+'h'='ASH'

Can you help me to learn more?

(Other definitions for ash that I've seen before include "Part of forest" , "Oleaceous tree" , "Rowan tree is also called the mountain . . ." , "Silvery-grey" , "Tree with silver-grey bark" .)

I've seen this clue in The Sun.
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.