Go faster, say, translating a trilogy (7,4)
I believe the answer is:
forsyte saga
'a trilogy' is the definition.
(trilogy of novels by John Galsworthy)
'go faster say translating' is the wordplay.
'translating' indicates an anagram (I've seen 'translated' mean this).
'go'+'faster'+'say'='gofastersay'
'gofastersay' anagrammed gives 'FORSYTE SAGA'.
(Other definitions for forsyte saga that I've seen before include "Galsworthy epic" , "series of novels" .)