You aren't really well out of them (5)
I believe the answer is:
sorts
'you aren't really' is the definition.
I can't tell whether this defines the answer.
'well out of them' is the wordplay.
I cannot really understand how this works, but
'well' could be 'so' (both can mean extremely) and 'so' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for sorts that I've seen before include "Kinds" , "Classifies" , "Categories" , "Arranges in different groups" , "Systematically arranges" .)