Minor routes leading to Eastern holiday location (6)
I believe the answer is:
I believe this is a double definition.
'minor routes' is the first definition.
'eastern holiday location' is the second definition.
(The Broads, group of lakes in the east of England)
'leading to' is the link.
(Other definitions for broads that I've seen before include "found in part of eastern England", "Old coins", "Wetland", "Norfolk holiday area".)