Isolated group subject turns son into Conservative (7)
I believe the answer is:
enclave
'isolated group' is the definition.
(I've seen this before)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for enclave that I've seen before include "Enclosed piece of territory" , "Enclosed territory, culturally distinct the one that surrounds it" , "Distinct community" , "Distinct territory within another" , "Region wholly within another" .)