Crossword Genius

A young lady that's out of order (5)

Ross

I believe the answer is:

amiss

'out of order' is the definition.
('amiss' can be a synonym of 'out of order')

'a young lady' is the wordplay.
'young lady' becomes 'miss' ('miss' can be a synonym of 'young lady'**).
'a'+'miss'='AMISS'

'that's' acts as a link.

(Other definitions for amiss that I've seen before include "Mistaken" , "Out of order" , "inappropriately" , "Taking wrong turn" , "Not quite right" .)

I've seen this clue in The Telegraph.
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