Clan’s note welcoming supportive member (5)
I believe the answer is:
tribe
'clan's' is the definition.
(synonyms)
'note welcoming supportive member' is the wordplay.
'note' becomes 'te' (musical note).
'welcoming' indicates putting letters inside (in sense of 'inviting in').
'supportive member' becomes 'rib' (I have seen 'structural member' mean 'rib' so perhaps 'member' could also mean 'rib'. I am not sure about the 'supportive' bit.).
'te' enclosing 'rib' is 'TRIBE'.
Can you help me to learn more?
(Other definitions for tribe that I've seen before include "Group of related families" , "A set or class of people, may be primitive" , "Family - clan" , "Clannish group" , "Group of people; big family" .)