Senior Tory's multiple personality entities (3)
I believe the answer is:
ids
This might be a double definition.
'senior tory's' is the first definition.
'ids' can be an answer for 'tory's' (I've seen this before). I'm not certain of the 'senior' bit.
'multiple personality entities' is the second definition.
Although both the answer and definition are plural nouns, I don't see how they can define each other.
Can you help me to learn more?
(Other definitions for ids that I've seen before include "Cards to identify the bearers, initially" , "Tory" .)