Young lady entering bank carelessly (8)
I believe the answer is:
remissly
'carelessly' is the definition.
Both the answer and definition are adverbs.
Maybe they are linked in a way I don't understand?
'young lady entering bank' is the wordplay.
'young lady' becomes 'miss' (synonyms).
'entering' indicates putting letters inside.
'bank' becomes 'rely' (I've seen this before).
'miss' going within 'rely' is 'REMISSLY'.
Can you help me to learn more?
(Another definition for remissly that I've seen is " with slipshod attitude".)