Jimmy Greaves.
Joined Tottenham 1961
Bill Nicholson.
Retired as a player 1955 and took FA coaching course to become first team coach 1955-1958.
Manager 1958 - 1974
I think it’s safe to assume that he would have appointed a coach on his promotion to manager, or possibly continued to coach himself.
Jimmy would have been one of the recipients of that coaching.