Brotherhood — weird lot, I'd say (8)
I believe the answer is:
sodality
'brotherhood' is the definition.
('sodality' can be a synonym of 'brotherhood')
'weird lot i'd say' is the wordplay.
'weird' indicates an anagram.
'lot'+'id'+'say'='lotidsay'
'lotidsay' with letters rearranged gives 'SODALITY'.
(Other definitions for sodality that I've seen before include "Fellowship" , "Confraternity or association, especially Roman Catholic" .)