Bad weather with the possibility of turning good (3)
I believe the answer is:
fog
'bad weather with the possibility' is the definition.
I can't tell whether this defines the answer.
'of turning good' is the wordplay.
'turning' says the letters should be written in reverse.
'good' becomes 'g' (abbreviation).
'of' written backwards gives 'fo'.
'fo'+'g'='FOG'
Can you help me to learn more?
(Other definitions for fog that I've seen before include "Obscure" , "Thick mist" , "Miasma" , "second growth of grass" , "Pea-souper" .)