Make a gentle neigh (6)
I believe the answer is:
whinny
(Other definitions for whinny that I've seen before include "Gentle or joyful neigh" , "Joyful neigh of a horse" , "Horse's cry" , "High-pitched neigh" , "A horse may do it" .)
I believe the answer is:
whinny
(Other definitions for whinny that I've seen before include "Gentle or joyful neigh" , "Joyful neigh of a horse" , "Horse's cry" , "High-pitched neigh" , "A horse may do it" .)