Morale for example comes to nothing (3)
I believe the answer is:
ego
'morale' is the definition.
(I've seen this before)
'example comes to nothing' is the wordplay.
'example' becomes 'eg'.
'comes to' says to put letters next to each other.
'nothing' becomes 'o' (looks like zero - 0).
'eg'+'o'='EGO'
'for' acts as a link.
(Other definitions for ego that I've seen before include "One's image of oneself" , "One's sense of self-importance" , "Self-esteem, sense of self" , "(Person's) sense of self-esteem" , "Personal pride" .)