Crossword Genius

Dumpy one's in trouble for creating new identity (9)

Ross

I believe the answer is:

pseudonym

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'creating new identity' is the definition.
I can't tell whether this defines the answer.

'dumpy one's in trouble' is the wordplay.
'in trouble' indicates anagramming the letters.
'dumpy'+'ones'='dumpyones'
'dumpyones' is an anagram of 'PSEUDONYM'.

'for' acts as a link.

Can you help me to learn more?

(Other definitions for pseudonym that I've seen before include "Goliath, for one" , "Pen name - use my pond (anag)" , "Pen-name" , "Name adopted by someone for a particular role" , "in the style of George Eliot?" .)

I've seen this clue in The Guardian.
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