"Great Expectations" hero (3)
I believe the answer is:
pip
'great expectations hero' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for pip that I've seen before include "Palindromic apple seed" , "Spot (on card); seed (of fruit)" , "Palindromic pear seed" , "Philip" , "star" .)