She has the heart to urge people on (5)
I believe the answer is:
peggy
'she' is the definition.
'the heart to urge people on' is the wordplay.
'the heart' means to look at the middle letters.
'to urge' becomes 'impel' (impel can mean to urge or demand).
'people on' becomes 'eggy' (I can't explain this - if you can you should believe this answer much more).
The middle letter of 'impel' is 'p'.
'p'+'eggy'='PEGGY'
'has' is the link.
Can you help me to learn more?
(Other definitions for peggy that I've seen before include "one associated with Sue" , "Dolly < bird" , "- - Lee, popular singer" .)