Shoot British at hacienda (6)
I believe the answer is:
branch
'shoot' is the definition.
(thesaurus)
'british at hacienda' is the wordplay.
'british' becomes 'b' (abbreviation e.g. in 'BBC').
'at' is a charade indicator (letters next to each other).
'hacienda' becomes 'ranch' (I've seen this before).
'b'+'ranch'='BRANCH'
(Other definitions for branch that I've seen before include "'Fork, offshoot (6)'" , "regional office" , "Trunk offshoot" , "Fork of a main stem" , "Part of a tree; division" .)