Separate identity given in sleazy bar (6)
I believe the answer is:
divide
'separate' is the definition.
(separate can mean to divide or split)
'identity given in sleazy bar' is the wordplay.
'identity' becomes 'id' (abbreviation).
'given in' means one lot of letters goes inside another.
'sleazy bar' becomes 'dive' (dive can mean a seedy or sleazy bar).
'id' going inside 'dive' is 'DIVIDE'.
(Other definitions for divide that I've seen before include "Saying : '. . . . . . and conquer'" , "Separate, distribute" , "Bisect" , "Split in two" , "Part" .)