Crossword puzzle clue "some evidence left by a smoker"

Some evidence left by a smoker

Smoker's evidence

Wrap right over left, tuck right underneath, pull, pinch right in a loop, wrap left around, push left through hole to create loop, pull loops

Evidence left by arsonists

Evidence left behind

Bit of biological evidence left at a crime scene, maybe: Abbr.

Evidence left by a moth

Evidence left behind