Family groups (6)
'groups' is the definition.
(more than one biological genus)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for genera that I've seen before include "Types" , "Taxonomic categories (biology)" , "Forms" , "Blood vessel" , "Taxonomic groups" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">family groups</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Another definition for clans that I've seen is " Scots family group".)