Paperwork classes… (5)
I believe the answer is:
I believe this clue is a double definition.
'paperwork' is the first definition.
(I've seen this in another clue)
'classes' is the second definition.
('form' can be a synonym of 'class')
(Other definitions for forms that I've seen before include "Shapes" , "beds for animals" , "Documents to be filled in" , "Takes shape" , "Benches" .)