Unfortunately brought up fellow with the German amphibian (10)
I believe the answer is:
salamander
'amphibian' is the definition.
(I know that salamander is a type of amphibian)
'unfortunately brought up fellow with the german' is the wordplay.
'unfortunately' becomes 'alas' ('alas' is used to express regret).
'brought up' says the letters should be written in reverse (in a down clue, letters go up).
'fellow with' becomes 'man' (I've seen this in other clues).
'the german' becomes 'der' ('the' in German).
'alas' back-to-front is 'sala'.
'sala'+'man'+'der'='SALAMANDER'
(Other definitions for salamander that I've seen before include "Long-tailed amphibian" , "Beast" , "portable stove" , "poker" , "Mythical fire lizard" .)