I found this one fairly straightforward, solving time 15 mins.
Notes on some clues below, happy to explain others if asked.
* = anagram
ACROSS
4 SCR AMBLE Senior Common Room
11 LI (MOG) ES French city
14 SCATTER BRAINED Which cryptically could mean (a binder)*
26 TUES DAYS “choose” “daze” with two separate homophone indicators “being heard” and “for the audience”.
DOWN
7 BEGUINE (I bungee)* Sister in a order.
18 I (e)MPRESS