Queen Richelieu has to make wealthy (6)
I believe the answer is:
enrich
'make wealthy' is the definition.
(I've seen this before)
'queen richelieu has' is the wordplay.
'has' indicates the answer is hidden within the clue.
'ENRICH' is hidden in the letters of 'queen richelieu'.
'to' acts as a link.
(Other definitions for enrich that I've seen before include "Concentrate" , "Give money" , "Heighten" , "Decorate" , "Grace" .)