Here are the possible solutions for paul simon advised him to make a new plan clue
Answer
Clue
Relevancy
stan
Clue
Paul Simon advised him to "make a new plan"
Paul Simon's "make a new plan" guy
Guy that Paul Simon advises to "Make a new plan"
"Make a new plan" guy, according to Paul Simon
norelation
Clue
Neil Simon, to Paul Simon, e.g.
plan
Clue
"Make a new ___, Stan" (Paul Simon lyric)
Definition
to formulate an idea
gus
Clue
Paul Simon told him to get on the bus to "Leave" his "Lover"
Definition
GU, (Old Norse) an old Shetland viol, also GUE, GJU
neko
Clue
Rocker Case who tweeted "If a dude called me a 'cougar' I'd be more likely to kill him bare-handed and shit him out in front of his parents than fuck him"