Unfriendly landlord, priest recalled (7)
I believe the answer is:
'unfriendly' is the definition.
(I know that unfriendly can be written as hostile)
'landlord priest recalled' is the wordplay.
'landlord' becomes 'host' (host can mean a landlord).
'priest' becomes 'eli' (biblical figure).
'recalled' is a reversal indicator.
'eli' backwards is 'ile'.
(Other definitions for hostile that I've seen before include "Aggressive" , "Enemy" , "Unkind" , "Belligerent" , "Bellicose" .)