Admirer hiding under emptied desk (6)
I believe the answer is:
bureau
'desk' is the definition.
(type of writing desk)
'admirer hiding under emptied' is the wordplay.
'admirer' becomes 'beau' (beau can mean a boyfriend or male admirer).
'hiding' is an insertion indicator.
'emptied' means to remove the middle letters.
'under' with its centre removed is 'ur'.
'beau' placed around 'ur' is 'BUREAU'.
(Other definitions for bureau that I've seen before include "Agency - writing desk" , "Item of furniture" , "The ------, familiar name of the FBI" , "Ancient chipped flint" , "Writing desk with drawers" .)