Slide for special child (4)
I believe the answer is:
skid
'slide' is the definition.
('skid' can be a synonym of 'slide')
'special child' is the wordplay.
'special' becomes 's' (common abbreviation as in Special Air Service).
'child' becomes 'kid' ('kid' can be a synonym of 'child'**).
's'+'kid'='SKID'
'for' is the link.
(Other definitions for skid that I've seen before include "unpredictable motoring event" , "Slide, eg, after braking" , "Runner" , "Lose control of a car" , "Slip out of control" .)