Toy did move about, a curious thing (6)
I believe the answer is:
oddity
'a curious thing' is the definition.
(I've seen this before)
'toy did move' is the wordplay.
'move' is an anagram indicator.
'toy'+'did'='toydid'
'toydid' with letters rearranged gives 'ODDITY'.
'about' acts as a link.
(Other definitions for oddity that I've seen before include "Something strange or peculiar" , "Curious item" , "Curious thing" , "Something strange or eccentric" , "Strange person/thing" .)