Atomiser broadcast starting to bother Geoffrey? (8)

I believe the answer is:

airbrush

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

'atomiser' is the definition.
(airbrush is a kind of atomiser)

'broadcast starting to bother geoffrey?' is the wordplay.
'broadcast' becomes 'air' (to air on TV).
'starting to' indicates taking the first letters.
'geoffrey?' becomes 'rush' (I can't explain this - if you can you should believe this answer much more).
The initial letter of 'bother' is 'b'.
'air'+'b'+'rush'='AIRBRUSH'

Can you help me to learn more?

(Other definitions for airbrush that I've seen before include "it's to smooth out the wrinkles" , "Artists spray tool" , "Doctor photographs etc" , "Sort of spray" , "Improve the image" .)

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

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