Nothing helping speech (7)
I believe the answer is:
oration
'speech' is the definition.
(oration is a kind of speech)
'nothing helping' is the wordplay.
'nothing' becomes 'o' (O resembles 0).
'helping' becomes 'ration' (a ration is a serving or helping).
'o'+'ration'='ORATION'
(Other definitions for oration that I've seen before include "eulogy" , "Making a speech" , "A formal or public speech" , "Ontario (anag)" , "An eloquent speech" .)