Plead with girl to accept Bill — maybe he’s not a nice person (3,3)
I believe the answer is:
bad egg
'he's not a nice person' is the definition.
I don't know anything about this answer so I can't tell whether this works.
'plead with girl to accept bill' is the wordplay.
'plead' becomes 'beg' (begging is a kind of pleading).
'with' says to put letters next to each other.
'girl' becomes 'g'.
'to accept' is an insertion indicator.
'bill' becomes 'ad' (advertisement stuck on wall).
'beg'+'g'='begg'
'begg' placed around 'ad' is 'BAD EGG'.
'maybe' is the link.
Can you help me to learn more?
(Other definitions for bad egg that I've seen before include "Rotter - something rotten!" , "A rotten ovoid" , "Rotten scoundrel?" , "wicked person?" , "Unpleasant person" .)