Sibling separated from dysfunctional parent, finally understood (4)
I believe the answer is:
kent
'sibling' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for kent that I've seen before include "English architect and landscape gardener" , "Part of 1 25 [KING LEAR]" , "County of SE England" , "Southern English county" , "known in Scotland" .)