Badger has to eat tops of radishes and swedes (6)
I believe the answer is:
harass
'badger' is the definition.
('harass' can be a synonym of 'badger')
'has to eat tops of radishes and swedes' is the wordplay.
'to eat' is an insertion indicator.
'tops of' suggests taking the first letters.
The first letters of 'radishes and swedes' is 'ras'.
'has' going around 'ras' is 'HARASS'.
(Other definitions for harass that I've seen before include "Trouble constantly" , "distress" , "Vex - persecute" , "Bother and annoy continuously" , "Persistently torment" .)