Cantaloupe, e.g (5)
I believe the answer is:
melon
'cantaloupe eg' is the definition.
(I know that Cucumis melo cantalupensis is a type of Cucumis melo)
This is all the clue.
(Other definitions for melon that I've seen before include "Large sweet gourd" , "US profits" , "Fruit of the gourd family with a hard rind and juicy flesh" , "Ogen or cantaloupe, for instance" , "Large vine fruit" .)