Turn up in the part of a werewolf, making a bloomer (6)
I believe the answer is:
flower
'a bloomer' is the definition.
(flower is a kind of flowering plant)
'turn up in the part of a werewolf making' is the wordplay.
'turn up in' says the letters should be written in reverse (I've seen 'turning up in' mean this).
'the part of' says the answer is hidden in the clue.
'rewolf' is hidden within 'werewolf making'.
'rewolf' backwards is 'FLOWER'.
(Other definitions for flower that I've seen before include "Don, say" , "Plant cultivated for blossoms" , "prime of life" , "the best one can pick" , "bloomer" .)