Small child's slides (5)
I believe the answer is:
skids
'slides' is the definition.
('skid' can be a synonym of 'slide')
'small child's' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'child's' becomes 'kids' ('kid' can be a synonym of 'child').
's'+'kids'='SKIDS'
(Other definitions for skids that I've seen before include "From coasts" , "Slides sideways" , "Slides without control" .)