Ban chilli; creates a painful foot condition (9)
I believe the answer is:
chilblain
'a painful foot condition' is the definition.
'chilblain' can be an answer for 'condition' (chilblain is a kind of condition). I'm unsure of the 'a painful foot' bit.
'ban chilli creates' is the wordplay.
'creates' indicates an anagram.
'ban'+'chilli'='banchilli'
'banchilli' with letters rearranged gives 'CHILBLAIN'.
Can you help me to learn more?
(Other definitions for chilblain that I've seen before include "Painful swelling on the skin brought on by cold" , "Painful swelling on hand or foot caused by cold" , "Inflammation from exposure to cold and moisture" , "Painful swelling in winter" , "Inflamed sore" .)