Notes small king has small tables (5)
I believe the answer is:
desks
'tables' is the definition.
(desk is a kind of table)
'notes small king has small' is the wordplay.
'notes' becomes 'de' (two musical notes).
'small' becomes 's' (abbreviation - e.g. clothes size).
'king' becomes 'K' (abbreviation for king in chess).
'has' means one lot of letters go next to another.
'small' becomes 's' (abbreviation - e.g. clothes size).
'de'+'s'+'k'+'s'='DESKS'
(Other definitions for desks that I've seen before include "Writing tables" , "Office furniture" , "Furniture at which to read, write etc." , "Work tables" , "School furniture" .)