In-house pansies, primarily as flower arrangement (7)
I believe the answer is:
chaplet
'flower arrangement' is the definition.
(chaplet is a kind of flower arrangement)
'in-house pansies primarily' is the wordplay.
'in' indicates putting letters inside.
'house' becomes 'chalet' (chalet is a kind of house).
'pansies primarily' becomes 'p' (I am not sure about this - if you are sure you should believe this answer much more).
'chalet' going around 'p' is 'CHAPLET'.
'as' is the link.
Can you help me to learn more?
(Other definitions for chaplet that I've seen before include "top band?" , "Circular garland for the head" , "Little fellow" , "Garland or wreath for the head" , "Ornamental wreath worn on the head" .)