A little bit of everything? (4)
I believe the answer is:
atom
'a little bit of everything?' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for atom that I've seen before include "Nucleus surrounded" , "Smallest component of an element" , "Small amount of matter" , "Part of molecule" , "Particle of matter now divided" .)