More important brother (5)
I believe the answer is:
prior
I believe this is a double definition.
'more important' is the first definition.
(I've seen this before)
'brother' is the second definition.
(thesaurus)
(Other definitions for prior that I've seen before include "Coming before in time or importance" , "Erstwhile" , "Previous; abbot's deputy" , "Already arranged" , "former conviction" .)