Strong and capable of writing a story (5)
I believe the answer is:
fable
'story' is the definition.
(I know that fable is a type of story)
'strong and capable' is the wordplay.
'strong' becomes 'f' (musical symbol for 'forte', 'strong' in Italian).
'and' is a charade indicator (letters next to each other).
'capable' becomes 'able' (synonyms).
'f'+'able'='FABLE'
'of writing a' acts as a link.
This may not be right. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for fable that I've seen before include "Allegory" , "Aesop story" , "Myth, legend" , "Aesop's story?" , "Short moral story" .)