Crossword puzzle clue "bit of some comet tails"

an electrically-charged particle formed by loss or gain of electrons by an atom

KNOT, to tie with a closed loop

to provide with a prophetic sign

a ruminant mammal

MERMAN, a fabulous creature with a man's body and a fish's tail

PI, to mix type indiscriminately

adapted to seize or grasp, esp. by wrapping round; as, the prehensile tail of a monkey, also PREHENSIVE, PREHENSORIAL, PREHENSORY