Showed chimpanzee maybe eating fruit with back of hand (8)
I believe the answer is:
appeared
'showed' is the definition.
(appear can mean to show or arrive)
'chimpanzee maybe eating fruit with back of hand' is the wordplay.
'chimpanzee maybe' becomes 'ape' (chimpanzees are apes).
'eating' indicates putting letters inside.
'fruit' becomes 'pear' (pear is a kind of fruit).
'with' says to put letters next to each other.
'back of' suggests the final letters.
The last letter of 'hand' is 'd'.
'ape' placed around 'pear' is 'appeare'.
'appeare'+'d'='APPEARED'
(Other definitions for appeared that I've seen before include "Became visible" , "Seemed - came into view" , "Turned up" , "Seemed - performed - emerged" , "Came into sight" .)