Attention-seeker backed by boss in workplace (6)
I believe the answer is:
studio
'in workplace' is the definition.
(I've seen this before)
'attention-seeker backed by boss' is the wordplay.
'attention-seeker' becomes 'oi' ('oi' is a way of getting somebody's attention).
'backed' is a reversal indicator.
'by' is a charade indicator (letters next to each other).
'boss' becomes 'stud' (both can mean a metal decoration).
'oi' written backwards gives 'io'.
'io' put after 'stud' is 'STUDIO'.
(Other definitions for studio that I've seen before include "Recording or painting workshop" , "Centre for movie-making" , "Workroom of an artist or photographer" , "Small apartment" , "Room to make radio or television programme" .)