Busks avidly, content reflecting requests (4)
I believe the answer is:
asks
'requests' is the definition.
('ask' can be a synonym of 'request')
'busks avidly content reflecting' is the wordplay.
'content' indicates a hidden word (I've seen 'contents of' mean this).
'reflecting' says the letters should be written backwards.
'sksa' is hidden in the letters of 'busks avidly'.
'sksa' back-to-front is 'ASKS'.
(Other definitions for asks that I've seen before include "Demands (something of someone)" , "Requests information about" , "Poses a question" , "Inquiries" , "Begs" .)