The same change can be made to each of the following words to yield new ones.

BONUS
CRONY
PONIES
COUPON
CLONING
CYCLONE

HINT:
The change involves dropping certain letters from each word.

Answer:

Dropping ON from each word leaves new words:

BUS
CRY
PIES
COUP
CLING
CYCLE

Credit: LA Times Crossword
Sylvia Bursztyn and Barry Tunick
GET ON IN  (adapted)