Butterfly farm monastery will accommodate (10)
I believe the answer is:
fritillary
'butterfly' is the definition.
(I know that fritillary is a type of brush-footed butterfly)
'farm monastery will accommodate' is the wordplay.
'farm' becomes 'till' (to till is to work on land).
'monastery' becomes 'friary' (friary is a kind of monastery).
'will accommodate' indicates putting letters inside (inserted letters are accommodated).
'till' going within 'friary' is 'FRITILLARY'.
(Other definitions for fritillary that I've seen before include "Plant of the lily family" , "Butterfly" , "Sort of lily" .)