Lovatts Mega Mix No 3

Really stuck please help thanks!!!!!!!!!!
8a they will happen according to Elvis Costello (9)
18a In the habit of being ousted in a disorderly fashion ( 4 2) ---- -o
69a One who rows about a ransom O-r---n (7)
70a Reluctance to disrupt icy Athens H-s---n-y (9)

7d African-american gospel song --i-i-u-l (9)
8d What our mum is called in Northern Ireland County --m-g- (6)
10d Germany to a German (11)
11d Early version of man found in 10d
54d 13th century welsh ruler titled Lord of Snowdonia L-e-e-l-- (9)
55d Nazi criminals were tried i this city N-r-m-e-- (9)