Shout of king having row (4)
I believe the answer is:
roar
'shout' is the definition.
(I know that roar is a type of shout)
'king having row' is the wordplay.
'king' becomes 'R' (abbreviation for rex, king in Latin).
'having' is a charade indicator (letters next to each other).
'row' becomes 'oar' (oar can mean to row with oars).
'r'+'oar'='ROAR'
'of' is the link.
(Other definitions for roar that I've seen before include "Make loud angry sound like lion" , "engine noise" , "Noise of lion" , "Make a loud noise" , "Lion's call" .)