let's talk...

i haven't got a clue!
to be perfectly honest i really wouldn't have a clue
i haven't got the foggies idea

take time to think
that's a good question
i'd say

to start : 
i'd start by saying
the first thing i would say

express opinion
as far as i'm concern ( per quanto mi riguarda)
to be honest, that's the
not to mention
in essence

answer
it's not a easy question to answer
good point!
 how interested!
oh my owness
i've never told on that
well, all right
i'm opened to question on this
i'm not enterly sure but
i've the impression that
i seem to remember that
i'm enclined to believe that
in actually facts i haven't got a clue
i'll be honest with you