Money to support the French language (5)
I believe the answer is:
latin
'language' is the definition.
(Latin is an example)
'money to support the french' is the wordplay.
'money' becomes 'tin' (I've seen this before).
'to support' means one lot of letters go next to another (in a down clue, some letters hold others up).
'the french' becomes 'la'.
'tin' put after 'la' is 'LATIN'.
(Other definitions for latin that I've seen before include "foreign language" , "Parent language of French,Romanian" , "a quarter of Parisians" , "ancient tongue" , "Learning it 'an honour' (Churchill)" .)