25a Fool the old US president, a leader hanging on to power at all costs (6) ???a?e
26a Idiot PM's tone (3-5) ??t ???w?
8d Boat builder's absence of expression of sexual satisfaction? (4) n???
5d 11a Arty sister meets "Big Boy" with yen to spill beans on leader of Senate; then it's over (5,12) w?n?? f???a?????g? (the answer is a pseudo name from the Eye)