Times Jumbo Cryptic 1029

[macpark]

As a Telegraph reader, I have found this a most frustrating crossword. It is SO different to the DT cryptic ones! Thanks all for the help and would you mind just a little more fro the last few clues?

6d Back securing ket to nuclear installation r?????r Reactor?
7dThink party must have switched sides c?????a?e
14a Broadcast chief is a fool ????e?d Fathead?
17a I have the power to retain the item liable to be taken off ?m?????e
22d Surly about agent always going topless with expedition ?r?e?t?y
48d Insolent supporter emptily supports an unknown ?r?s?y Brassy

[ubasses]

14 airhead

[vegasmad]

48d. yes, brassy - bra (supporter) + s(upport)s + y(unknown)

[ubasses]

48 yes bra(supporter) ss (empty supports) y (unknown)

[vegasmad]

6d. yes, reactor - rear (back) around c(key) + to

[vegasmad]

7d. cerebrate (think) - celebrate swapping the l(eft) for r(ight)

[Neveracrossword]

17 Imitable
22 Urgently

[tommy-h]

airhead,imitable,urgently,brassy

[bibblebub]

17a) imitable = i'm able outside of 'it'

22d) urgently = (s)urly outside of (a)gent

[mahonia]

17a imitable

[macpark]

Thank you all. It's finished, but I'm afraid I'm going to stick to the Telegraph in future!