Daily Telegraph Cryptic 2590 Sunday May 29th 2011

[SnakeEyes]

5d, Insult my claim to be competent as part of defence (8)
B?R???A?

7d, Subsqently a large and weak ruler shows crossword-solving skill (7,8)
L?T???L / ?????I??

18a, Deadly result of rearranging all the pieces (6)
?E????

[sandyRoe]

7 lateral thinking?

[ubasses]

7 ;lateral thinking

[Lie-in King]

5d Barb I can
7d Later a L thin-king
18a Lethal - anag 'all the'

[sandyRoe]

18 Lethal

[Ouzel]

7d Lateral thinking

[SnakeEyes]

Thank you