One after another reported trainee (6)
I believe the answer is:
intern
'trainee' is the definition.
(I've seen this before)
'one after another reported' is the wordplay.
'one after another' becomes 'inturn' (I've seen this before).
'reported' shows a homophone (sound like).
'inturn' is a homophone of 'INTERN'.
(Other definitions for intern that I've seen before include "(American) hospital doctor" , "Put in prison" , "Confine the hospital resident" , "Imprison the young doctor without trial" , "Young American 18" .)