Content to leave awful jelly, one often potted (4)
I believe the answer is:
alky
'one often potted' is the definition.
I can't judge whether this defines the answer.
'content to leave awful jelly' is the wordplay.
'content to leave' means to remove the middle letters (the contents of the word are removed).
'jelly' becomes 'ky' (I can't justify this - if you can you should believe this answer much more).
'awful' with its middle taken out is 'al'.
'al'+'ky'='ALKY'
Can you help me to learn more?
(Other definitions for alky that I've seen before include "Drunk" , "One regularly in drunken state" .)