Sea urchin delicacy (3)
I believe the answer is:
roe
'sea urchin delicacy' 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 "Caviar" , "Food from fish" , "Hoofed animal(s)" , "Mass of fish eggs" , "A mass of fish-eggs" .)