Passage about translation of 'signors' (8)
I believe the answer is:
crossing
'passage' is the definition.
(I've seen this before)
'about translation of signors' is the wordplay.
'about' becomes 'c' (circa).
'translation of' indicates an anagram (translate can mean to transform).
'signors' is an anagram of 'rossing'.
'c'+'rossing'='CROSSING'
(Other definitions for crossing that I've seen before include "trip on ferry?" , "Journey over water" , "Traversing" , "Junction" , "Passage" .)