Possible Clues:

• Figure for audience in John Cleese sketch
• Figure how the parrot has got away, by the sound of it
• Rhombus, for one
• Figure how a child might explain a parrot's flight
• Figure former educational establishment has almost disappeared
• Academic body discussed defunct quadrangle, say
• Figure with at least three straight sides
• Figure almost left behind old college
• Figure girl vanished as reported?
• Triangle, e.g