Head of department interrupting organized tour of royal house (5)
I believe the answer is:
tudor
'royal house' is the definition.
(Tudor is an example)
'head of department interrupting organized tour' is the wordplay.
'head of' indicates taking the first letters.
'interrupting' indicates putting letters inside.
'organized' indicates anagramming the letters.
The initial letter of 'department' is 'd'.
'tour' anagrammed gives 'tuor'.
'd' placed inside 'tuor' is 'TUDOR'.
'of' acts as a link.
(Other definitions for tudor that I've seen before include "English royal dynasty" , "Architectural style" , "Name of the English royal family of Elizabeth 1st" , "Former English royal house" , "A royal house of England" .)