Crossword puzzle clue "sets of two"

a plane with two sets of wings

(short for) devolution, as in devo max, an arrangement in which a central government transfers the maximum amount of authority to a regional government while still retaining sovereignty over it

an animal with two homologous sets of chromosomes

DYAD, two units treated as one; a couple; a pair, also DUAD

a large flightless bird, also EMEU

to catch fish with a pronged spear

PAIR, to arrange in sets of two