Thanks to G Kite for this - further efforts (of my own) have reduced the deficit to 4 but these remaining ones are baffling me :
8D - Scotch of superior flavour mostly - fizzy drink not from bottles (3, 1, 4, 2)
P?T A ??O? ??
18A - Small firearm used to guard house with jewel (9)
??O???E?O
23A - Getting to cat's side, mice's tails twitch (7)
?M???C
&
31D - Run off without permission, quietly seething (6)
?I?A?E