x-word help please

[elderly]

Mr elderly is showing some interest in his xwords today but needs help please to get his brain going.
MEPHISTO 2424
1A - Was very hard - fouled in jump to make a violent interception? (9) ??S??H???
15D - Crowds going by taxi rather a lot? (9) ???????E?
AZED 1812
1D - Before the hour of d-drink, it offers two alternatives (6) ???G??
29A - Aquatic insects: none act swimmingly (9) ??????C?A
He would be grateful for any help - thanks

[kayakamina]

1a Bushwhack

15d Cab oodles

[kayakamina]

1d Mrs Elderly you have given the clue for 1a but the letters for 1d

1a Tossup

1d Twigloo...Twig (fashion) + loo (somewhere to go)

29a Notonecta

Best wishes to you both

[elderly]

Kayakamina - Very many thanks for your help - Yes I did get in a muddle!! I'm not thinking straight. Thanks again.