Effervescent perfume? (5)

I believe the answer is:

scent

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

'effervescent perfume?' is the definition.
'scent' can be an answer for 'perfume?' ('scent' can be a synonym of 'perfume'). I am not sure about the 'effervescent' bit.

'effervescent perfume?' is the wordplay.
'SCENT' is hidden within the letters.
However, I'm not sure how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for scent that I've seen before include "Bouquet" , "Perfume for the tracker" , "Fragrance" , "Track; aroma" , "Number of clues" .)

I've seen this clue in the Evening Standard.

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