Crossword Genius

More than a couple get amnesia or worse (6,1,5)

Ross

I believe the answer is:

menage a trois

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'more than a couple' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'get amnesia or worse' is the wordplay.
'worse' indicates an anagram (I've seen this in other clues).
'get'+'amnesia'+'or'='getamnesiaor'
'getamnesiaor' with letters rearranged gives 'MENAGE A TROIS'.

Can you help me to learn more?

(Other definitions for menage a trois that I've seen before include "household of unusual size" , "complicated arrangement!" , "Triangular relationship(s)" , "living arrangements" , "third party involvement?" .)

I've seen this clue in the Sydney Morning Herald.
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