French wine boards to talk about economy (6)
I believe the answer is:
saving
'economy' is the definition.
('saving' can be a synonym of 'economy')
'french wine boards to talk about' is the wordplay.
'french wine' becomes 'vin' (I've seen this before).
'boards' means one lot of letters goes inside another.
'to talk' becomes 'gas' (I've seen this before).
'about' is a reversal indicator.
'gas' back-to-front is 'sag'.
'vin' put within 'sag' is 'SAVING'.
(Other definitions for saving that I've seen before include "See 18" , "Cost reduction, except" , "Preventing from dying" , "Putting by for a rainy day" , "Discount" .)