Pickup illegal bit from Tablet (4)
I believe the answer is:
pill
'tablet' is the definition.
('pill' can be a synonym of 'tablet')
'pickup illegal bit from' is the wordplay.
'from' indicates a hidden word.
'PILL' is hidden within 'pickup illegal bit'.
(Other definitions for pill that I've seen before include "Medical tablet" , "Form of medicine" , "may be the cure" , "Dose of medicine" , "Pellet of medicine" .)