Could that be ma's plaything? (2-2)
I believe the answer is:
yo-yo
'plaything?' is the definition.
(I know that yo-yo is a type of plaything)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for yo-yo that I've seen before include "Child's toy on a string" , "Fluctuate repeatedly" , "Toy that rises and falls" , "-- - -- Ma, American cellist of Chinese/French origins" , "Fluctuate rapidly" .)