Hang about with French trainees, getting drunk (10)
I believe the answer is:
fraternise
'hang about with' is the definition.
(fraternise can mean to associate or hang out with)
'french trainees getting drunk' is the wordplay.
'french' becomes 'fr' (abbreviation).
'getting drunk' indicates an anagram.
'trainees' is an anagram of 'aternise'.
'fr'+'aternise'='FRATERNISE'
(Other definitions for fraternise that I've seen before include "sociable" , "Consort" , "Be friendly with" , "Trains free (anag.)" , "Associate with" .)