Lightweight don yob thrashed (6)

I believe the answer is:

nobody

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

'lightweight' is the definition.
(both can mean an insignificant person)

'don yob thrashed' is the wordplay.
'don yob' can be anagrammed to 'NOBODY'.
However, I am not clear how this is indicated.

Can you help me to learn more?

(Other definitions for nobody that I've seen before include "Eg Pooter" , "not a VIP" , "Person without influence" , "Person without authority or standing - hardly exists" , "Literary diarist" .)

I've seen this clue in The Sun.

Want a hint initially instead of a full solution? Install my app