A name is confused - memory's at fault (7)

I believe the answer is:

amnesia

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'memory's at fault' is the definition.
I can't judge whether this definition defines the answer.

'a name is confused' is the wordplay.
'confused' indicates anagramming the letters.
'name'+'is'='nameis'
'nameis' anagrammed gives 'mnesia'.
'a'+'mnesia'='AMNESIA'

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(Other definitions for amnesia that I've seen before include "Asia men with memory loss (7)" , "Clinical loss of memory" , "Recall trouble" , "Am I sane? (anag)" , "Elephants won't suffer such" .)

I've seen this clue in The Globe and Mail.

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