Trainee accountant Edward recalled (5)
I believe the answer is:
cadet
'trainee' is the definition.
(cadet is a kind of trainee)
'accountant edward recalled' is the wordplay.
'accountant' becomes 'ca' (abbreviation for chartered accountant).
'edward' becomes 'ted'.
'recalled' shows that the letters should be reversed in order.
'ted' reversed gives 'det'.
'ca'+'det'='CADET'
(Other definitions for cadet that I've seen before include "Officer-trainee" , "Apprentice officer" , "Military student" , "Trainee soldier" , "aspiring officer" .)