It's a more unusual spray (8)

I believe the answer is:

atomiser

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'spray' is the definition.
(I know that spray can be written as atomiser)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for atomiser that I've seen before include "Device for making liquid into a fine spray" , "I, maestro can reduce liquids to a fine spray" , "Perfume spray" , "Amortise for spray-creating device" , "Container that releases liquid in a fine spray" .)

I've seen this clue in The Sun and The Guardian.

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