Negative report heard from nag (5)
I believe the answer is:
neigh
'heard from nag' is the definition.
I can't tell whether this defines the answer.
'negative report' is the wordplay.
'negative' becomes 'nay' (nay is a kind of negative).
'report' shows a homophone (sound like).
'nay' sounds like 'NEIGH'.
Can you help me to learn more?
(Other definitions for neigh that I've seen before include "Whinnying sound" , "Hinge (anag.)" , "High-pitched cry of a horse" , "Cry coming from mount" , "The noise of a bay" .)