Doctor Verne has courage (5)
I believe the answer is:
nerve
'courage' is the definition.
(nerve is a kind of courage)
'doctor verne' is the wordplay.
'doctor' indicates anagramming the letters.
'verne' anagrammed gives 'NERVE'.
'has' is the link.
(Other definitions for nerve that I've seen before include "Brass - steel" , "Audacity (informal)" , "Mettle, daring" , "Bundles of fibres in the body that transmit instructions" , "Valour, pluck" .)