Crossword Genius

Able to sell radio for scrap (6)

Ross

I believe the answer is:

cancel

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

'for scrap' is the definition.
(I've seen this before)

'able to sell radio' is the wordplay.
'able' becomes 'can'.
'to sell radio' becomes 'cel' (I can't justify this - if you can you should believe this answer much more).
'can'+'cel'='CANCEL'

Can you help me to learn more?

(Other definitions for cancel that I've seen before include "Cross out or annul" , "Go for an annulment" , "Annul, revoke" , "Annul or rescind" , "Officially prevent happening" .)

I've seen this clue in the Sydney Morning Herald.
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