1) Acts shrewish 2) Acts the back-seat driver 3) Acts the shrew 4) Aged steeds 5) Annoying people 6) Annoys constantly 7) Asks and asks and asks 8) Asks repeatedly 9) Back seat drivers 10) Badgers 11) Badgers or bugs 12) Beat horses 13) Beaten-down horses 14) Bettors bet on them 15) Bothers 16) Bothers persistently Found on https://www.crosswordclues.com/clue/nags