French playwright needing more to pen story (7)
I believe the answer is:
moliere
'french playwright' is the definition.
(I've seen this before)
'more to pen story' is the wordplay.
'to pen' means one lot of letters goes inside another.
'story' becomes 'lie' (story can mean a fabrication).
'more' going around 'lie' is 'MOLIERE'.
'needing' is the link.
(Other definitions for moliere that I've seen before include "French writer" , "French dramatist" , "C17 French playwright (Le Misanthrope)" , "Fr. dramatist (Tartuffe)" , "Fr. comic dramatist" .)