Blood group (6)
I believe this is a double definition.
'blood' is the first definition.
(family is a kind of blood)
'group' is the second definition.
(family is a kind of group)
(Other definitions for family that I've seen before include "Group of people related to one another" , "One's relations" , "Kin" , "line" , "Group of related things" .)
(Other definitions for clan that I've seen before include "Group with a tartan?" , "Highland grouping" , "Kin group" , "Large family forming close group, big in Scotland" , "Group with common ancestor, like the Campbells" .)