Trendy European with pint, clumsy (5)
I believe the answer is:
inept
'clumsy' is the definition.
(I know that clumsy can be written as inept)
'trendy european with pint' is the wordplay.
'trendy' becomes 'in' ('in' can mean fashionable).
'european' becomes 'E' (abbreviation e.g. EU).
'with' says to put letters next to each other.
'pint' becomes 'pt' (abbreviation).
'in'+'e'+'pt'='INEPT'
(Other definitions for inept that I've seen before include "Wanting" , "Futile" , "Absurd or unskilful" , "Hopeless; bungling" , "Awkward, showing no skill" .)