A platform for rolling fish on table (10)
I believe the answer is:
skateboard
'a platform for rolling' is the definition.
(platform with wheels)
'fish on table' is the wordplay.
'fish' becomes 'skate' (skate is a kind of fish).
'on' is a charade indicator (letters next to each other).
'table' becomes 'board' (board is a kind of table).
'skate'+'board'='SKATEBOARD'
(Other definitions for skateboard that I've seen before include "which carries playful youth along" , "Youth transport" , "Wheeled plaything" , "Means of travel on rollers" , "Transporter used for hot dog" .)