Drunken bum slunk around Lima? Idiot! (9)
I believe the answer is:
numbskull
'idiot' is the definition.
(I've seen this before)
'drunken bum slunk around lima?' is the wordplay.
'drunken' indicates an anagram.
'around' means one lot of letters goes inside another.
'lima?' becomes 'L' (phonetic alphabet: alpha, bravo, charlie etc.).
'bum'+'slunk'='bumslunk'
'bumslunk' is an anagram of 'numbskul'.
'numbskul' going around 'l' is 'NUMBSKULL'.
(Other definitions for numbskull that I've seen before include "Fool" , "Stupid person" , "Blockhead, bonehead" , "Dimwit" , "Idiot" .)