Drop, globule (4)
I believe the answer is:
blob
This clue is a double definition.
'drop' is the first definition.
(I've seen this in another clue)
'globule' is the second definition.
(I've seen this in another clue)
(Other definitions for blob that I've seen before include "Indistinct object" , "Indeterminate mass" , "Small piece signifying nothing" , "Indistinct shape" , "Soft globule" .)