The CLUE must be
in the bag.
The Big Bang Theory Season 7, Episode 3
Can you reach the CLUE?
The Big Bang Theory Season 7, Episode 3
Really? What was your first CLUE?
The Big Bang Theory Season 2, Episode 10
There's got to be a CLUE
here somewhere.
The Big Bang Theory Season 12, Episode 2
A CLUE to help us.
Money Heist Season 1, Episode 8