colossus stinker 146

Hi All,

having trouble with:
57 ac: stupid & boorish
33dw; tricycle taxi
43 dw: explain theory
112 dw: unrelated comment (3,8)
119 dw: concensus
147 ac: needle-shaped peak.

Me thinks I need to get a better crossword dictionary! lOL.
Any help would be appreciated.
Pip