Strange slur with a gin cocktail (8)
I believe the answer is:
singular
'strange' is the definition.
(I've seen this before)
'slur with a gin cocktail' is the wordplay.
'with' means one lot of letters go next to another.
'cocktail' is an anagram indicator.
'slur'+'a'+'gin'='sluragin'
'sluragin' anagrammed gives 'SINGULAR'.
(Other definitions for singular that I've seen before include "Odd; unique" , "Extraordinary, with reference to one" , "Unusual, striking, or unique" , "Denoting one" , "Unusual, maybe unique" .)