Completely stuck on top right-hand quarter.
7dn, 'Sound made by marine life on tree in Venice attraction?' (6,5), M?S?L? ??A?H; MUSCLE something, presumably;
9ac, 'Goblin and wizard recalled in puzzle', (6);
11dn, ' Vote for him, OK? Feel stupid? Aargh!' (3,3,4,2,4);
12dn, 'Partner no longer having time in court, gone for ever', (7).
One or two of these are a bit exotical, as we say in Bristol.