What boy does with toy in nursery verses? (6)
I believe the answer is:
rhymes
'verses?' is the definition.
('rhyme' can be a synonym of 'verse')
'what boy does with toy in nursery' is the wordplay.
I cannot quite see how this works, but
'boy' could be 'hy' and 'hy' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for rhymes that I've seen before include "Similarities of word sounds as in verse" , "Pieces of poetry" , "Short poems" , "Nursery . . . . . . are jingles for children" , "Nursery . . . . . . are simple poems for children" .)