Eccentric is to read of celestial object (8)
I believe the answer is:
asteroid
'celestial object' is the definition.
'asteroid' can be an answer for 'object' (asteroid is a kind of object). I am not certain of the 'celestial' bit.
'eccentric is to read' is the wordplay.
'eccentric' indicates an anagram.
'is'+'to'+'read'='istoread'
'istoread' with letters rearranged gives 'ASTEROID'.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for asteroid that I've seen before include "Small rock orbiting the sun" , "Minor planet" , "Small planet revolving round the sun" , "Small body orbiting sun" , "Small celestial body composed of rock and metal" .)