Move bran to small buildings (5)
I believe the answer is:
barns
'buildings' is the definition.
(barn is a kind of building)
'move bran to small' is the wordplay.
'move' indicates an anagram (I've seen 'moved' mean this).
'to small' becomes 's' (abbreviation - e.g. clothes size).
'bran' with letters rearranged gives 'barn'.
'barn'+'s'='BARNS'
(Other definitions for barns that I've seen before include "Farm buildings" , "Stables" , "Agricultural outbuilding" , "Sheds" , "Agricultural outbuildings" .)