Be able to broadcast under any conditions? (5)
I believe the answer is:
nohow
'under any conditions?' is the definition.
('nohow' can mean 'anyway')
I can't explain the remainder of the clue.
(Other definitions for nohow that I've seen before include "In any manner" , "Absolutely not in America" , "Not at all in US" , "Under no circumstances (as Tweedledum said)" , "not at all the American way?" .)