Sen. Wyden is on said Committee, and asked Clapper a question that, in Clapper's own words, he answered with a "least untruth" statement that was "too cute by half". This can be roughly translated as "a baldfaced lie".
Apart from that, I am personally unaware of any instances where DNI Clapper has publicly lied.
Additionally, DNI Clapper appears to only answer prepared questions (i.e. forwarded to his office prior to the discussion). I'm not sure if this is standard protocol for Congress, and for obvious reasons I also don't know if this applies to private briefings.
Certainly you'd send a list of prepared questions if you were holding a hearing to get answers. Otherwise the guy might be able to plausibly claim that he doesn't have the details and would have to get back to them.
If you're holding a hearing just to ask a trap question on camera then you might deliberately not send prepared questions, but I would like to think my elected representatives have more respect for people than that.
Apart from that, I am personally unaware of any instances where DNI Clapper has publicly lied.
Additionally, DNI Clapper appears to only answer prepared questions (i.e. forwarded to his office prior to the discussion). I'm not sure if this is standard protocol for Congress, and for obvious reasons I also don't know if this applies to private briefings.