A couple of females propping up bar in Scottish town (5)
I believe the answer is:
banff
'scottish town' is the definition.
(town in Scotland)
'a couple of females propping up bar in' is the wordplay.
'a couple of females' means two replacements for 'female'.
'female' becomes 'f' (abbreviation).
'female' becomes 'f' (abbreviation).
'propping up' means one lot of letters go next to another (in a down clue, some letters hold others up).
'bar' becomes 'ban' (bar can mean to ban or prohibit).
'in' indicates putting letters inside.
'f' after 'ban' is 'banf'.
'f' going within 'banf' is 'BANFF'.
(Other definitions for banff that I've seen before include "Scots community" , "Historic county town in Grampian" , "Scots town" , "Canadian location" , "Town (and old county) in Aberdeenshire" .)