Unimaginative drunk, real mess (7)
I believe the answer is:
literal
'unimaginative' is the definition.
(I've seen this before)
'drunk real mess' is the wordplay.
'drunk' becomes 'lit' (I've seen this in another clue).
'mess' is an anagram indicator.
'real' is an anagram of 'eral'.
'lit'+'eral'='LITERAL'
(Other definitions for literal that I've seen before include "Ill rate (anag.)" , "Word-for-word" , "character fault?" , "Accurate and unexaggerated" , "All tire (anag.)" .)