Mare's son (4)
I believe the answer is:
colt
(Other definitions for colt that I've seen before include "Young player" , "runner" , "Male foal" , "Rod" , "Type of American revolver" .)
I believe the answer is:
colt
(Other definitions for colt that I've seen before include "Young player" , "runner" , "Male foal" , "Rod" , "Type of American revolver" .)