Part of facade thrills trainee (5)
I believe the answer is:
cadet
'trainee' is the definition.
(cadet is a kind of trainee)
'part of facade thrills' is the wordplay.
'part of' indicates a hidden word.
'CADET' can be found hidden inside 'facade thrills'.
(Other definitions for cadet that I've seen before include "Officer-trainee" , "Younger member of family" , "Trainee soldier" , "not the heir" , "young soldier" .)