Shad eggs (3)
I believe the answer is:
roe
'shad eggs' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for roe that I've seen before include "Part of fish, sounds like go through water" , "Mass of fish's eggs" , "eg Caviare" , "Hoofed animal(s)" , "shy animal" .)