Pound, at first, on the table (4)
I believe the answer is:
list
'the table' is the definition.
(thesaurus)
'pound at first' is the wordplay.
'pound' becomes 'L' (the pound sign is based on an L).
'at' means one lot of letters go next to another.
'first' becomes 'ist' (ist resembles 1st).
'l'+'ist'='LIST'
'on' is the link.
(Other definitions for list that I've seen before include "Roll; (of ship) lean over" , "Inventory" , "Pay attention" , "Boat's inclination" , "Series of entries" .)