Crossword Genius

He left here with a girl - irresponsible (6)

Ross

I believe the answer is:

remiss

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

'irresponsible' is the definition.
Both the answer and definition are adjectives. Maybe you can see a link between them that I can't see?

'he left here with a girl' is the wordplay.
'left' suggests deleting specific letters.
'with' is a charade indicator (letters next to each other).
'a girl' becomes 'miss' (term of address for an unmarried woman).
'here' with 'he' taken away is 're'.
're'+'miss'='REMISS'

Can you help me to learn more?

(Other definitions for remiss that I've seen before include "Neglectful" , "Failing in what duty requires" , "Negligent, lax" , "Careless and inattentive" , "Derelict in duty" .)

I've seen this clue in the Evening Standard.
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