Better in French clubs avoiding risk (7)
I believe the answer is:
enhance
'better' is the definition.
(enhancing is a kind of bettering)
'in french clubs avoiding risk' is the wordplay.
'in french' becomes 'en' ('in' in French).
'clubs' becomes 'c' (abbreviation used in card games such as bridge).
'avoiding' is a deletion indicator.
'risk' becomes 'chance' (chance is a kind of risk).
'chance' with 'c' taken away is 'hance'.
'en'+'hance'='ENHANCE'
(Other definitions for enhance that I've seen before include "Raise in value or quality" , "Improve the value of (something)" , "Increase in power" , "'Improve, augment (7)'" , "Add function, appeal, to" .)