A looser spray or a liquid spray (7)

I believe the answer is:

aerosol

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

'a liquid spray' is the definition.
(I've seen this before)

'a looser spray' is the wordplay.
'a looser' can be anagrammed to 'AEROSOL'.
But, I'm not sure how the anagram is indicated.

'or' is the link.

Can you help me to learn more?

(Other definitions for aerosol that I've seen before include "See 17 down [CONTAINER]: under pressure" , "Spray producer" , "Atomiser" , "Pressurised container releasing fine spray" , "Air-spray" .)

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

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