Fit wrapping round King's Row (5)
I believe the answer is:
'row' is the definition.
(row can mean to argue)
'fit wrapping round king's' is the wordplay.
'fit' becomes 'ague' (ague is a fit of fever).
'wrapping round' indicates putting letters inside.
'king' becomes 'R' (abbreviation for rex, king in Latin).
'ague' placed around 'r' is 'ARGUE'.
(Other definitions for argue that I've seen before include "Dispute, disagree" , "Bandy words" , "Fall out" , "Disagree heatedly" , "Contend, maintain" .)