Huge blokes, drunk, semi-clad (7)
I believe the answer is:
immense
'huge' is the definition.
(synonyms)
'blokes drunk semi-clad' is the wordplay.
'blokes' becomes 'men' (I've seen this in other clues).
'drunk' is an anagram indicator.
'clad' indicates putting letters inside (clad can mean covered by).
'semi' is an anagram of 'imse'.
'men' going within 'imse' is 'IMMENSE'.
(Other definitions for immense that I've seen before include "Extremely large or great" , "Superb" , "Unusually large or great" , "Mammoth" , "Jumbo" .)