What’s part of beach life? Eros, perhaps (8)
I believe the answer is:
asteroid
I believe this clue is a double definition.
'what's part of beach life?' is the first definition.
(asteroid can mean a starfish)
'eros perhaps' is the second definition.
(Eros is an asteroid)
(Other definitions for asteroid that I've seen before include "looking like a star?" , "Small celestial body moving around the sun" , "Rocky body in orbit" , "Small rocky object orbiting the sun - store aid (anag)" , "Ceres, say" .)