Get confused with nuclear family member (5-5)
I believe the answer is:
great-uncle
'family member' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'get confused with nuclear' is the wordplay.
'confused with' indicates anagramming the letters.
'get' with its letters mixed up with 'nuclear' makes 'GREAT-UNCLE'.
Can you help me to learn more?
(Another definition for great-uncle that I've seen is " Relative".)