You will get a positive response (3)
I believe the answer is:
yea
'positive response' is the definition.
('yea' can mean yes)
'you will get a' is the wordplay.
'you' becomes 'ye'.
'will get' is a charade indicator (letters next to each other).
'ye'+'a'='YEA'
(Other definitions for yea that I've seen before include "Positive vote" , "Yes (archaic)" , "Certainly (archaic)" , "Affirmative, colloquially" , "Verily" .)