Hedonist tense following exam in German city (3,6)
I believe the answer is:
bon vivant
'hedonist' is the definition.
(I've seen this before)
'tense following exam in german city' is the wordplay.
'tense' becomes 't' (abbreviation used in many dictionaries).
'following' is a charade indicator (letters next to each other).
'exam' becomes 'viva' (short for 'viva voce', an oral examination).
'in' is an insertion indicator.
'german city' becomes 'Bonn' (city in Germany).
'viva' placed within 'bonn' is 'bonvivan'.
't' put after 'bonvivan' is 'BON VIVANT'.
(Other definitions for bon vivant that I've seen before include "Jovial companion" , "One who enjoys eating and drinking" , "He's fond of good food and wine - in France" , "Hedonist" , "one enjoying best courses" .)