Ready to follow the French language (5)
I believe the answer is:
latin
'language' is the definition.
(Latin is an example)
'ready to follow the french' is the wordplay.
'ready' becomes 'tin' (both are slang terms for money).
'to follow' is a charade indicator (letters next to each other).
'the french' becomes 'la'.
'tin' after 'la' is 'LATIN'.
(Other definitions for latin that I've seen before include "Parent language of French,Romanian" , "Hispanic, for example" , "Language of ancient Rome" , "Romantic language" , "A Romance language" .)