Broadcast avoids last of Soho's lively bars (7)
I believe the answer is:
scherzo
'lively bars' is the definition.
(lively bars of music)
I can't explain the rest of the clue.
(Other definitions for scherzo that I've seen before include "(Musically) a fast movement, usually in triple time" , "Symphonic movement, may have trio" , "Eg acquiring this lively piece" , "Fast movement of symphony" , "Vigorous musical movement" .)