What is the crossword answer for the clue: ___ fingerprint

DNA - a 3 letter word may be the answer you are looking for!

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

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

___ fingerprint

3 Character Answers:

DNA

4 Character Answers:

CLUE

5 Character Answers:

SMEAR