Teeter-totters (7)
I believe the answer is:
seesaws
'teeter-totters' is the definition.
(I know this)
This is the entire clue.
(Other definitions for seesaws that I've seen before include "Yo-yos" , "Playthings in the park" , "Pieces of playground furniture" , "Playground games" , "Boards balanced on fulcrums, children's playthings" .)