Pam's aim is to go over details of foul air (6)
I believe the answer is:
miasma
'air' is the definition.
(I have seen 'Unwholesome air ' mean 'miasma' so perhaps 'air' could also mean 'miasma')
'pam's aim is to go over details of foul' is the wordplay.
'MIASMA' is hidden back-to-front in amongst the letters.
However, I'm not sure how this is indicated.
Can you help me to learn more?
(Other definitions for miasma that I've seen before include "Noxious vapour" , "Stink" , "Accomplished" , "Foul vapours or unwholesome air" , "foul atmosphere" .)