Reportedly attack king as citizen of republic (5)
I believe the answer is:
czech
'king as citizen of republic' is the definition.
I can't tell whether this defines the answer.
'reportedly attack' is the wordplay.
'reportedly' shows a homophone (sound like).
'attack' becomes 'check' (checking is a kind of attacking).
'check' is a homophone of 'CZECH'.
Can you help me to learn more?
(Other definitions for czech that I've seen before include "Central European" , "European language" , "Nationality of citizen of Prague" , "Bohemian" , "One from Brno" .)