Stolen season as a spa feature (3,6)

I believe the answer is:

hot spring

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'a spa feature' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.

'stolen season' is the wordplay.
'stolen' becomes 'hot' (stolen goods are 'hot').
'season' becomes 'spring' (spring is a season).
'hot'+'spring'='HOT SPRING'

'as' is the link.

Can you help me to learn more?

(Another definition for hot spring that I've seen is " source of 8 [RENEWABLE ENERGY]".)

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

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