Ravine enclosing English patron saint (6)
I believe the answer is:
george
'patron saint' is the definition.
(I know that George is a patron saint)
'ravine enclosing english' is the wordplay.
'ravine' becomes 'gorge' (gorge is a kind of ravine).
'enclosing' means one lot of letters goes inside another.
'english' becomes 'E' (abbreviation as in OED).
'gorge' going around 'e' is 'GEORGE'.
(Other definitions for george that I've seen before include "Flight controller" , "King" , "Dragon-slaying saint" , "-- Formby; -- Eliot" , "Boy's name" .)