Radio set tuned finding celestial body (8)

I believe the answer is:

asteroid

I'm a little stuck... Click here to teach me more about this clue!

'celestial body' is the definition.
(asteroid is a kind of celestial body)

'radio set tuned' is the wordplay.
'radio set' can be anagrammed to 'ASTEROID'.
But, I'm not sure how the anagram is indicated.

'finding' acts as a link.

Can you help me to learn more?

(Other definitions for asteroid that I've seen before include "Minor planet" , "Rocky body in orbit" , "Small rocky object orbiting the sun - store aid (anag)" , "circling rock" , "Lump of rock orbiting the sun" .)

I've seen this clue in The Telegraph.

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