Prudence, leading on without a vision? (6,5)
I believe the answer is:
common sense
'prudence' is the definition.
(I've seen this before)
'leading on without a vision?' is the wordplay.
I cannot quite understand how this works, but
'on' is present in the answer.
'vision?' could be 'sense' (vision is a kind of sense) and 'sense' is present in the answer.
This explanation may well be incorrect...
(Other definitions for common sense that I've seen before include "realistic" , "Gumption" , "Good judgment" , "Reasonable" , "Nous" .)