Individuals with evaginated organ (4)
I believe the answer is:
ones
'individuals' is the definition.
(one can mean an individual person or thing)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for ones that I've seen before include "Singles" , "Individuals" , "(Of ship) returning to port of origin" , "Units" , "Singletons" .)