Went back with Frenchman, eg to return diamonds (7)
I believe the answer is:
reneged
'went back' is the definition.
(I've seen this before)
'frenchman eg to return diamonds' is the wordplay.
'frenchman' becomes 'rene' (common French name).
'to return' is a reversal indicator.
'diamonds' becomes 'd' (abbreviation in bridge say).
'eg' reversed gives 'ge'.
'rene'+'ge'+'d'='RENEGED'
'with' acts as a link.
(Other definitions for reneged that I've seen before include "Went back on (a promise)" , "Go back on, or revoke in card game" , "Broke a promise" , "Was a rat" , "Did Welsh" .)