See guerrilla interrupting schedule (9)
I believe the answer is:
rochester
'see' is the definition.
(a 'see' is the location of a cathedral)
'guerrilla interrupting schedule' is the wordplay.
'guerrilla' becomes 'che' (guerrilla fighter Che Guevara).
'interrupting' indicates putting letters inside.
'schedule' becomes 'roster' (I've seen this before).
'che' placed within 'roster' is 'ROCHESTER'.
(Other definitions for rochester that I've seen before include "town with a cathedral and castle" , "ancient port" , "Jane Eyre accepted" , "Kentish Town" , "Novel hero" .)