Niche vacation (6)
I believe the answer is:
recess
This clue is a double definition.
'niche' is the first definition.
(I know that niche can be written as recess)
'vacation' is the second definition.
(I know that recess is a type of vacation)
(Other definitions for recess that I've seen before include "Niche; temporary cessation of parliament" , "secluded spot" , "Temporary break from work" , "Small niche or court holiday" , "A niche or a temporary business break" .)