Crossword Genius

Complete eccentric forgetting name (5)

Ross

I believe the answer is:

utter

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'complete' is the definition.
(I know that complete can be written as utter)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for utter that I've seen before include "(Of counterfeit money) put into circulation - say" , "Perfect" , "outright" , "Speak, articulate" , "Pronounce - total" .)

I've seen this clue in The Times.
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