Annoy king having a fortune but missing penny (4)
I believe the answer is:
rile
'annoy' is the definition.
(I know that annoy can be written as rile)
'king having a fortune but missing penny' is the wordplay.
I cannot quite see how this works, but
'king' could be 'r' (abbreviation of Latin rex) and 'r' is present in the answer.
The remaining letters 'ile' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for rile that I've seen before include "Provoke" , "Get up nose of" , "Anger, annoy" , "Irritate considerably" , "Make angry" .)