mc5 - Obscure vault 99 (7)

It's the cryptic crossword discussion game. Tease each other with clues, help each other with the dailies, educate the beginners, whatever.

Big Dave

[Darren]

1) Adam Clayton?
4) Radar?

Martha Farquar

[Again Darren]

2) Ottawa?
3) Arcadian?

Hugo Rune

I'd guess those are right, so here's one of mine. I'm not a great cryptics man, so my goal is merely competence: Ingrained bear of the ocean floor (4-6).

Boolbar

I note my pork rump clue went unnoticed. :o)

Darren

[Big Dave/Martha Farquar] Yes, all four correct!