Crossword Genius

See doomster rant terribly -- that could be me (12)

Ross

I believe the answer is:

demonstrator

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'me' is the definition.
Both the definition and answer are singular nouns.
Perhaps they are linked in a way I don't understand?

'see doomster rant terribly' is the wordplay.
'terribly' indicates anagramming the letters.
'doomster'+'rant'='doomsterrant'
'doomsterrant' anagrammed gives 'DEMONSTRATOR'.

'that could be' is the link.

Can you help me to learn more?

(Other definitions for demonstrator that I've seen before include "showroom car" , "shower" , "Participant in a public protest" , "One who shows how things work" , "Rally participant" .)

I've seen this clue in The Telegraph.
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