Crossword puzzle clue "some pairs of roos lack them"

LACE, to draw together two edges with a cord

OCTET, a composition for eight players, also OCTETT, OCTETTE

HOPPER, a container for grain, also HOPPERCAR

JOEY, a young kangaroo

KED, a wingless fly that infests sheep, also KADE

DUO, two people considered a pair for a specific reason

ESSE, (Latin) actual existence, essence

ARM, to supply with weapons