Crossword puzzle clue "part of a london police officer's uniform"

BOBBYSOCK, an ankle-sock, esp. as worn by teenage girls

(French) a shoulder ornament or badge worn by military and naval officers, also EPAULETTE

(short for) a narcotics agent, also NARCO

BRAID, to form into a braid, a plait

the plea in a criminal charge of having been elsewhere at the relevant time

to bring to a standstill

a substitute, a standby