What is the crossword answer for the clue: Smoking gun

CLUE - a 4 letter word may be the answer you are looking for!

CLUES - a 5 letter word may be the answer you are looking for!

PROOF - a 5 letter word may be the answer you are looking for!

PROOFPOSITIVE - a 13 letter word may be the answer you are looking for!

Smoking gun

4 Character Answers:

CLUE

5 Character Answers:

CLUES

PROOF

13 Character Answers:

PROOFPOSITIVE