That did push me to a full grid but can't parse three entries.
Longer spell of fine weather's third month - ace for a Japanese city (7)
O*A*A*A
I have OKAYAMA
Law finding politician out of bounds (3)
J*S (3)
I have JUS from my O level Latin
Henry V's contemptuous gesture, neglecting odd parts of kingdom
*I*O (4)
I have FIGO but can't justify the "F"