Infected with cold in Alabama, is dubious (9)
I believe the answer is:
sceptical
'dubious' is the definition.
(I've seen this before)
'infected with cold in alabama' is the wordplay.
'infected' becomes 'septic' (similar in meaning).
'with cold' becomes 'c' (eg on taps. I am not sure about the 'with' bit.).
'in' means one lot of letters goes inside another.
'alabama' becomes 'al' (abbreviation).
'septic' going around 'c' is 'sceptic'.
'sceptic'+'al'='SCEPTICAL'
'is' is the link.
Can you help me to learn more?
(Other definitions for sceptical that I've seen before include "Inclined to doubt accepted opinions" , "Disinclined to believe" , "Inclined not to believe" , "Doubting or disbelieving" , "dubious" .)