Corrupt dealer has something worn at table hiding king and queen (6)
I believe the answer is:
briber
'corrupt dealer' is the definition.
'something worn at table hiding king and queen' is the wordplay.
'something worn at table' becomes 'bib'.
'hiding' means one lot of letters goes inside another.
'king' becomes 'r' (r is abbreviation for rex).
'and' means one lot of letters go next to another.
'queen' becomes 'er' (abbreviation for Elizabeth Regina).
'bib' placed around 'r' is 'brib'.
'brib'+'er'='BRIBER'
'has' is the link.
(Other definitions for briber that I've seen before include "Old thief" , "Giver of backhanders" .)