Doesn't look the same in a blackout (7)

I believe the answer is:

amnesia

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

'blackout' is the definition.
(I know that amnesia is a class)

'doesn't look the same in a' is the wordplay.
'same in a' can be anagrammed to 'AMNESIA'.
But, I'm not sure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for amnesia that I've seen before include "Disorder" , "Recall trouble" , "memory problem" , "Seaman I found in state of memory loss" , "Inability to remember" .)

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

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.