He urges one change to facilitate quick growth (10)

I believe the answer is:

greenhouse

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'he urges one change to facilitate quick growth' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.

'he urges one change' is the wordplay.
'change' indicates anagramming the letters.
'he'+'urges'+'one'='heurgesone'
'heurgesone' anagrammed gives 'GREENHOUSE'.

Can you help me to learn more?

(Other definitions for greenhouse that I've seen before include "A place for growing" , "Horticulturalists' glass building" , "associated with harmful gases" , "see-through construction" , "somewhere hot" .)

I've seen this clue in The Globe and Mail.

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