Lovatts Colossus No126 Giant Cryptic

Hi need help with the following
1a Old Private investigator mixed up degree with another qualification (7)
1d Astonish mum by having nothing in fund (9)
3d Cotton bur is becoming a hindrance (11)
11a More drinks outside religious brothers (5)
34a Keen on dancing on it (4)
45a Veteran soldier organised rare show (8)
64a Apparently apes are underground fighters (10)
46d Understudy disguised pearl with cement (11)
47d Peace offering from green field (5, 6)
61d Former partner dealt with upheaval and was praised highly (7)

Hope someone can help.
Cheers
smithy