Story about courage (5)

I believe the answer is:
fibre
'courage' is the definition.
The definition and answer can be both human attributes as well as being singular nouns.
Perhaps you can see an association between them that I don't see?
'story about' is the wordplay.
'story' becomes 'fib' (synonyms).
'about' becomes 're' ('re' means regarding or about).
'fib'+'re'='FIBRE'
Can you help me to learn more?
(Other definitions for fibre that I've seen before include "Long fine thread" , "Thread, filament" , "In brief, a thread" , "Brief (anag.)" , "Threadlike substance" .)