A podgy little chap can still have such charm! (5)
I believe the answer is:
fatal
'still have such charm' is the definition.
I can't judge whether this definition defines the answer.
'a podgy little chap' is the wordplay.
'a podgy little' becomes 'fat' (I can't explain this - if you can you should believe this answer much more).
'chap' becomes 'Al' (man's name).
'fat'+'al'='FATAL'
'can' is the link.
Can you help me to learn more?
(Other definitions for fatal that I've seen before include "Unavoidable" , "Leading to disaster" , "Disastrous, maybe lethal" , "Death-dealing" , "Causing death, say accident" .)