King George et al protecting male family members (12)

'family members' is the definition.
The answer and definition can be both people as well as being plural nouns.
Perhaps there's an association between them I don't understand?

'king george et al protecting male' is the wordplay.
I cannot quite see how this works, but
'king' could be 'er' (I've seen this in other clues) and 'er' is found within the answer.
'george' could be 'gr' and 'gr' is located in the answer.
'male' could be 'm' (common abbreviation) and 'm' is found in the answer.
This explanation may well be incorrect...

Can you help me to learn more?