People needing a broken rib set (6)
I believe the answer is:
tribes
'people' is the definition.
Although both the answer and definition are plural nouns, I can't see how one could define the other.
'a broken rib set' is the wordplay.
'a broken' is an anagram indicator.
'rib'+'set'='ribset'
'ribset' anagrammed gives 'TRIBES'.
'needing' is the link.
Can you help me to learn more?
(Other definitions for tribes that I've seen before include "Groups of people related by blood" , "races" , "Racial groups living in communities headed by chiefs" , "Groups of families in traditional societies" , "Social groups in traditional societies" .)