D/m Cryptic

[petal54]

need help with 3 please......

19a6l.where hordes get drunk in Med.r---e-
24a4l.they will br themselves as shipping guides,say.b---
20d7l.only unnamed MP and one adult ,ake London venue.----p-a
many thanks

[penelope2]

19a Rhodes (anagram)

[MargoTester]

Rhodes
Boys
Olympia

[BlueScorpion]

19*a Rhodes
24a boys
20d Olympia

[petal54]

many thanks all