One clears the air with former agriculturalist? (9,3)
I believe the answer is:
extractor fan
'agriculturalist?' is the definition.
I know nothing about this answer so I cannot tell whether this works.
'one clears the air with former' is the wordplay.
I cannot quite see how this works, but
'one' could be 'an' (an apple is one apple) and 'an' is located in the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is located in the answer.
'former' could be 'ex' (prefix meaning former or onetime) and 'ex' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for extractor fan that I've seen before include "Device to remove stale air or fumes" , "Kitchen odour remover" .)