Fail to pay a bill repeatedly at the King's Head (4)
I believe the answer is:
bilk
'fail to pay a bill' is the definition.
I can't judge whether this defines the answer.
'repeatedly at the king's head' is the wordplay.
'repeatedly' becomes 'bil' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'at' is a charade indicator (letters next to each other).
'head' suggests taking the first letters.
The initial letter of 'kings' is 'k'.
'bil'+'k'='BILK'
Can you help me to learn more?
(Other definitions for bilk that I've seen before include "Acker --, jazzman" , "Thwart" , "Defraud; Acker --, clarinettist" , "Cheat or defraud" , "Bamboozle" .)