Pen has the French ways of writing (6)
I believe the answer is:
styles
'ways of writing' is the definition.
'styles' can be an answer for 'ways' ('style' can be a synonym of 'way'). I'm unsure of the 'of writing' bit.
'pen has the french' is the wordplay.
'pen' becomes 'sty' (both can mean an animal enclosure).
'has' is a charade indicator (letters next to each other).
'the french' becomes 'les' (plural form of 'the' in French).
'sty'+'les'='STYLES'
Can you help me to learn more?
(Other definitions for styles that I've seen before include "'Fashions, modes (6)'" , "Distinctive manners" , "Fashions and trends" , "Approaches" , "Fashions or ways of doing things" .)